Not really I don’t pay attention to dungeons
yeah i’m thinking a cooldown would be the best way to balance the ability…but it was still nice to have i think.
plus i liked the direction with making guilds a bit more…impactful on gameplay? the perks are nice and all, but i think we could use some more out of them. 
Dk has death gate and Priest do have a two void portal animation in game that could be used. The normal swirling portal and the void portal that has the hands rip open a doorway.
(for the sake of animations already ingame)
Those are mostly personal ports and not a group one. We had one problem with giving guilds such group ports in the past .It was designed at first for just that reason for raids and dungeons to skip running through the place out,they used it later for other raids like Sw and Orgtimmar skipping being pvped, just pop in and out.,repeatedly.
Now, this suggestion that everyone should have a group port,what guarantee it would be misused when they can do the same repeatedly as each person can have that ability with no down time.
What’s all this summon trolling yall are talking about, literally never heard of this. Also how would mages being able to summon make that worse?