What really, REALLY grinds my gears the most, that Outland beasts, for the MOST part, are identical to Azeroth ones. Kaliri, Wolves, others etc, shouldn't look like Azeroth ones. At least the Outland basilisks were given new heads to show that these are alien creatures. It really irritates me. Any Outland beast that didn't come to Outland from Azeroth, should be at the very least, be given a new head on their models to make them more alien. Period. Even the spikey raptors and wind serpents need changing a bit IMO.
And why should a pet be locked into a certain class type? I want the talent trees to be open for pets as they are for the player. If I want my Sporebat to be a tank, then I should be able to choose the talent tree for it.
As for the rest, what the hey I'm just going through the whole darned list.
Disclaimer, this is just my 2cents, some of you will probably hate some of my thoughts and I'm fine with that
BATS : Needs to be remodeled, and at least 3 or 4 new skin types added.
BIRDS OF PREY : Mostly fine, but some changes are needed. Parrots need to taken out completely and given their own family type. Parrots are not birds of prey dammit. Seagulls need to be remodeled, it shouldn't look like a vanity/critter pet.
CHIMERA : No issues with them, though they could add that one unused skin somewhere.
DRAGONHAWKS : Model is fine, but what do they do when they're too tired to flap those wings? Do they slither like a snake? Do they wrap their tails around a branch and hang? They should add the remaining unused skins as well.
MONKEYS : I think the model could do with a bit of touching up, it's a bit jagged in some areas. More skin types would be nice too. Needs a better ability. Really? Crap throwing? Pft.
NETHER RAYS : Model is just fine, but they really really need a better ability, like zapping the enemy with a nether energy blast or something. Anything would be better than what it has now. Maybe a couple more skins too.
RAVAGERS : No problems here, it's spikey spikey love, but they really should be a ferocity pet.
SERPENTS : No problems here. They should add all those regular snakes to their own family though, a Python family would be sweet.
SILITHIDS : No problems here.
SPIDERS : The widow types could do with a model touch up so their legs aren't so jagged. Also, I really hate the antenna action on their heads. Those aren't antenna dammit and shouldn't fuss about like them. The windows also need their heads done better overall too, mush like what the spikey spider have, but with less extreme sized fangs. Speaking of spikey spiders, I don't have any dramas with them, but they really need more skins. Bone spiders, I dunno, they kinda work as is, aside the silly antenna action and heads. Tarantulas, for the love of god they NEED to be remodeled. They don't look like tarantulas, they looks like blocks. Also they need more skins.
SPOREBATS : Model is fine, but do they ever need new skins selections desperately.
WIND SERPENTS : Model wise they're ok I suppose, maybe one or two new skins for the regular ones, and make use of the unused skin for the spikeys
CARRION BIRDS : Maybe some updating of the Vulture models and couple of new skins. Why they decided to not have tamable ravens/crows I'll never understand. They should remodel them and add them
CATS : Very badly needs a remodel. And it wouldn't hurt to have 3 or 4 different cat model types either. Actually six models. Lion, Lioness, Tiger, Panther, Lynx, Cheetah. Then assign skins as appropriate to the models. Outside of that, Cats do NOT need any more skin varieties, there is more than enough as is.
CORE HOUNDS : Not a fan of these at all, but they could do some updating to their model, it's really blocky in some parts.
DEVILSAURS : Maybe touch up the model a bit, possibly 2 or 3 new skins.
DOGS : I'm not afraid to say it, I really hate that demon dogs are tamable. They should have stayed demons. That said, their model is old and needs updating. The mastiffs, fine I suppose. Not a big skin selection, could do with more. I dunno, in general I don't really think they should have domesticated dogs and such, but if they were gonna keep going on that path, then more normal dogs should be added. Mastiffs can't be the only ones on Azeroth.
FOXES : I think the model needs more work, it looks like it's as old as the vanilla beasts. Also, more skin choices would be a plus.
HYENAS : Definately needs a remodel. Not sure there would be many more suitable colors to run with for new skins, but there should at least be a black one.
MOTHS : No real problems here, one or two new skins maybe but not really all that needed.
RAPTORS : Remodel. And give more skin options that don't have damn feathers/bands/etc on them, wtf.
TALLSTRIDERS : Model for the most part isn't too bad, legs could do with some updating. Need more skin choices.
WASPS : Firefly types could do some model updates, but otherwise this family is pretty much fine. Blue firefly skin should be added, that would own.
WOLVES : All wolf types desperately need to be remodeled. Especially those horrible saber worgs. All the wolves suffer from spikey fail, and do they all have to have that rediculous snarl ALL the time? Skin wise, well I don't really think they need any more color options.
BEARS : Likewise badly need a remodel, and to ditch that snarl. Perhaps two or three bear model types? Polar, Grizzly and... I dunno, something-else-bear.
BEETLES : Maybe a slight model tweaking update but no real dramas here, skin choice is fine, though a Xmas/Jewel beetle skin type would look awesome (look em up)
BOARS : Hell yes to a remodel. Pumba ain't on no diet. The armored skins need to be done better too.
CRABS : The original crab could do with some remodeling, and a couple of new skin choices too. The unused skins on the spikey crabs should be added as well. I wouldn't mind a crab model with both pincers the same size, they do exist in the real world!
CROCOLISKS : The original ones need some work, I actually thought the new model we got in Cata would have replaced the old one entirely.
GORILLAS : Hmmm, I was originally gonna say give em an update to the model, but I think really it should just get a remodel entirely
RHINOS : Remodel. Make them look like a rhino, rather a kodo with a rhino head, and then give us more skin choices. Non wooly choices.
SCORPIDS : Remodel the originals, but hey, I'd be more than happy if they just replaced it entirely with the new one for Cata and remade all the old skins for it. Luuuuurve.
SHALE SPIDERS : More colors! Where is the blue one dammit!
TURTLES : Remodel, remodel now. I'd like smooth shell options as well please, and at least four more skin choices.
WARP STALKERS : Just some model updates/touch ups.
WORMS : Minor model touch ups.
There, I think that covers most of my thoughts
Time for a break now