I was thinking that there could be a de-vamp potion, meaning, it could turn your pet back to its regular version. (for people who miss the old creatu)

As much as many people will support this, it won't happen. The point of Revamps is to bring the art quality up to par. If people were able to spontaniously devamp their pets, it would defeat the purpose of revamping in the first place. Not to mention, we don't want to have two different designs for each pet running around, the way neopets does (I don't have anything against neopets, but I disagree with their decision to leave pets unconverted). It would also make it easier to get "glitch colors", the way you could when you used, say, a mirabilis morphing potion on an albino gondra. You'd get a missing picture if you devamped an albino mirabilis. And who wants that? ;c

Overall, no support.