Two things occurred to me while categorizing my Showroom.
1. There are a lot of great names sitting on long-abandoned and iced accounts. Iced users will 99.9% never return to that account, so those names should be cleared without a doubt. For abandoned accounts, I think there should be a time limit. If they haven't logged in in at least 4-5 (or maybe more) years, maybe their names should be cleared up, too. In case the user returns, maybe they could keep the actual pet but have to choose new names?
2. I have a lot of pets for one user (450-500). And I don't consider myself even close to some people's collections. There is no system in place to prevent obsessive hoarding. I think there should be a cap, figured mathematically like 3 of each creatu/color combo per person. It gives leeway to collectors so that can have 1 of each creatu/color if they wish, plus extra if they like a particular pet. It's hard to explain simply, so I'll give a scenario.
Let's say I'm a Meiko collector. There are 28 total color options for Meiko, including dyed mutants. If we divide 28 times 3 (so it's possible to have each stage of one color), I can have a total of 84 Meikos. Now let's say I don't like Intes. Intes have 28 total color options, including dyed mutants. If I don't want any Intes, I can apply those 84 available "slots" to other pets, including my Meiko collection, so I can have 168 Meiko, or even more if I choose. You, in effect, have a number of slots determined by the current number of creatu/color combinations. What you choose to use them on is your prerogative. Using this system, there is still a large amount of creatu one user can own, so most people wouldn't be forced to downsize considerably.
Opinions or suggestions on a better way to improve this idea are welcome. :)