First thing first new stuff is always refreshing, was it though intended that XP is disabled in the zone ?
While i dont mind to get ported around by the goo i always worry though that i might end up with too many mobs and hit the mob agro cap and get possibly ported out of the zone.
Yesterday as i tried the zone the first time i actually liked it that there was no respawn, today with the respawn i had actually problems as i tried figuring Gloombone out and got adds during one of the attempt.
Now to Goombone itself well i assume its intended that the Pools in general cant be taunted , on my last attempt i managed to kill all the pools and had Gloom pretty low on health i believe in the 30% range when he popped another wave of pools and they wiped my team out pretty fast.
While i dont mind it a bit more challenging and wouldn't mind to spend more time in the instance i believe a instance that possibly is only available for a week it might be for the difficulty on some events a bit to much (T 6 in my case and just run with 1 group).