In the end its about how people wanna play the game, if they take advantage of the AoE pets and they're running dungeons so easy, then if the problem is them getting many drops from certain dungeon, maybe restricting how many times you can run a certain dungeon could be an option or just removing the unrestricted pass from shop or at least making the price way higher
So your solution to potential abuse of aoe pets if they get implemented, is to basically restrict gameplay in certain areas and/or make access to them more difficult? I mean, this is a prime example of what players who want to actually fight, fear hearing in the future should an attempt to balance an issue such as this. Players with both stats and the skill level to actually earn their way through these dungeons, would be greatly restricted at that point. And people who run dungeons for drops/enchants will be none too pleased at this either.
I'm still against aoe pets, period. If they do get implemented though, there should
never be a conversation on how to better balance the game to deal with the potential abuse of them, unless the solution is just to remove their aoe effect or make any mobs affected by it become entirely immune to
all other aoe pets for say 3 mins. If you change honest to god gameplay, to balance the pets, you can be hurting the game. If you want aoe pets, i would encourage you to come up with more creative ideas that won't have much if any impact, on regular gameplay.