You know, I'm annoyed they can add unique icons for new pets like that croc, which could have easily just used the regular croc icon, but can't add some new icons for some of the hunter pet families that need them. >_>
I agree, making all the hunter pet families have exclusive icons should be a higher priority.
Sorry for straying further off topic, but I just wanted to comment on this.
It does seem odd for so much work to be put into an icon for a single battle pet which, while undoubtedly cool, will probably ultimately lay buried in the majority of people's pet journals along with hundreds of other cool pets. This is compared to a pet family which will be viewed by many players every day for the rest of the life of the game. At a guess (and it IS just a guess), I suspect it's more political. That they may have more trouble justifying their time working on anything but new content. It's just an impression I get, and I could well be wrong.
At least we got better icons for the majority of the "bad icon" families in 5.1. I know this was Noah's doing, but he can only swap them if the icons already exist. There's only a few families that really badly need them now, basilisks and shale spiders being the most prominent. As far as I'm aware there are no icons that look like either. I'd be happy to be proven wrong.
Battle pet shale spiders just use that abstract "coloured stone" icon. Even though it doesn't look like a shale spider, perhaps it's better than the current spider icon.
The single basilisk battle pet just uses some kind of claw icon, from memory.
Apart from those, it'd be nice to have a real dog icon instead of a spiked collar, and probably also a crane that wasn't wearing a helmet and a monkey that isn't just a suggestive hand/banana pose. But at least the current icons for those are unique to the families.