I dont think there has been any actual brand new skins. Essentially almost all are just the same basic model but textured or colored differently. The spiders essentially three are unique colored atleast, and it could be like madexx just more madexxs up at a time ^.^ who will kill you.. oh the horrific horror.. the gondrias, well how many people complained about the purple color, now you can choose blue or white. I say it and will say it again Ban is different from olm, hes a heck of alot bigger, his effects are amazing and hes a 100% more vibrant then olm. The crab, shiny gem crab! Its shiny! And Skarr may be somewhat hunched back but in my view because of the texture, his big sunken eyes he is pretty different then the other hunched back cats who essentially have glowy eyes not blackmaws eyes.
So essentially 4.2 is choices.
Do you want a spider? If so which one? Orange, purple, and green you have little choice but to camp (unless we find those baby greens again) or you can take a chance and get the huge yellow spider or risk certain death with skitter.
Do you like crabs? Noone likes crabs.. but I mean these crabs! No you can get an extremely shiny unique skinned crab.
Do you love cats, and like the buff they bring? Well you can try for the stone cat in molten front,
4.2 is about the challenge of the tame, a new way of thinking for hunters where we have to think and prepared before a tame besides just placing a trap down and hitting tame. If you want one go for it, if not wave and continue on your merry way (or tell some other hunters

)
Basically guys the thing is only 2 of them will people get confused with as just being a common mob. The others they will know you for sure you worked your butt off to get, and its the hard tames that make pets, atleast for me more special then some I stumbled upon for kicks.