These are seriously cool! I love your art style too.
I'm not completely sold on Jurassic Quinn, though. A pet pterodactyl would be amazing, but the rest of her feels kind of...lacking, almost. Valor ties into the whole Jurassic theme, but Quinn herself could just as easily be a safari guide or a spelunker with the simple addition of a head-lamp. That's a problem, especially considering that you'll be seeing Quinn more often than Valor in-game.
Scuba is a lot better, because then you have a concept that carries even if you disregard Valor; you've got the harpoon, the mask, the wetsuit. It's undeniably scuba or deep sea. And everyone has a weakness for giant sting-rays. That's pretty much a universal constant. :p Oh, and bubbles.
Also, while this isn't necessarily about the skins, I love your attention to detail in your art! It's almost like you adapted your shapes to better fit the concept of your skins! You've got a lot of sharp edges in your Jurassic but in your Scuba you adapted to "noodle arms" (which actually work with your art as opposed to actual anatomical errors) and curves that just fit. I can't explain why I love it so much. Just comparing side by side and noticing those little differences just gives me a giddy feeling because it's just so great that you did that, intentionally or not! I mean, damn son. That's awesome.