I think this is an original idea but idk and I don't plan to look through all posts.

New idea! An area where pets are not able to be used! If you summon a pet it attacks you! Do something like the mage or whatever characters from early on and make them summon minions. The mobs and bosses are upgraded pets and are much more OP. Your pet i unkillable unless you dismiss it. May level out some stuff. Lemme know what you think! Add more ideas! If you hate expansions give ideas for new ones. The community must shape the game just as much as the devs! NO IDEA IS A BAD IDEA!