I'm not sure how to respond to this since it's such an odd request. Although I could see your point, I don't see the appeal. It sounds like more trouble than it's worth. Part of the reason for the revamps is to improve the quality of the site. There are some users who might appreciate this (I, for one, would love to see my little Paor back to the way he was) but there would be a lot of users who'd be mad that their pets didn't get revamped because they like the new design. They'd feel left out and I know I have to accept the new revamp and the ones to come.
As for your request of "mature" items, I feel somewhat offended. Res is, and will always be, a kids site. The point of this site being for "all ages" is that little kids can play and adults, if they like this kind of stuff, are welcome. I'm not exactly sure what you mean by a "mature" item that wouldn't be directed towards the youngsters, but my mind jumps to things like drugs, guns, and ecchi. Those things will never be on the site, I'm 110% certain.
Absolutely No Support