I saw this on the WoW Forum and thought the idea could benefit from being on here as well.
I recently had the same idea based off the Ranger pet system in GW2
A Special Hunter Pet Collection Tab that allows you to Call any pet that you have tamed.
The “stable” could also be available through this tab in the same way you set a team for pet battles, so that stable specific glyphs will work.
The collection tab could also show pet models the Hunter has not collected so that we can go out and find them in the same way the Mount tab shows mounts we don’t have.
To keep the companionship feeling, the name of each pet should be saved within the tab as well.
The only draw back I see would be if the Hunter wanted multiples of the same pet model. Currently vanity pets are limited to 3 and it annoyingly shows up in the tab 3 times rather than stacking in some way.
Credit to the OP: https://us.battle.net/forums/en/wow/...?page=1#post-4