Virtual Pet Game. Yes, this site might have one soon. However, please be patient. It takes a lot of time to make these! If you have any questions, please post them in the Help Center. Thank you!
Reviving and reincarnation, like Magnus said, are the same. However, I don't think there should be a limit on how many of your characters get it for all powers, and same with how many times you use it.
I don't think longer claws should be abnormal, because in the book Tigerclaw had super long claws. :3 However, the two tails can go in there.
As for walking in others' dreams, all species should be allowed for that. Otherwise, everyone will play a cat, and there really would be no point for the whole animal section in the shop.
As for the give your cat a power, I don't think it could be added. Almost everything you suggested is a power, ya know? But perhaps it could be a combopack where you have all powers? It'll be super expensive, yes, but it saves space.
I don't think it's safe to say that the Warriors fandom is dying. Your forum is dying, that's all. Don't blame it on something that isn't true. Look around the Internet a bit and you'll find several massive Warriors forums out there. The fandom's definitely not dying, especially when the Hunters keep making Warriors books, and so long as there's a fandom for it, they'll continue making it until they run out of ideas. They're going to keep milking the cash cow until it doesn't give anymore, and that won't be for a long time.