There were a few bugs we noticed during testing of the PTS. Of course all that we came across were reported but I don't see anything in the 5.2 patch notes to indicate they were actually paid attention to. I'm at work so currently pulling from the memory.
Notably:
Keeper Imiril was completely ignoring block, hits were not being mitigated at all while blocking and tanks were taking full damage.
Reported an easier way to farm gold keys.
Unable to revive allies during the Transmuted Alit fight in Darkshade. Were given the message that the player was already being revived.
Garron the Returned in Wayrest all players were taking damage while clearly well outside of the telegraphed circles for summoned adds. If it was one or two we may have over looked this one as a bit of lag on the players part but we watched each person, if they were in the circle when it was summoned it did not matter how far from it they were when it blew they would take the considerable exploding damage.
None of these were mentioned in the patch notes. We can assume they're fixed because they weren't occurring before 1.5 so maybe there was no need to mention them for 1.5.2. If they're not fixed however should we then assume there is no value in reporting bugs on PTS as they're maybe perused but mostly ignored?
Other than the easy(ier) gold key opportunity the others may not happen 100% of the time but that they happen at all could be a real issue. Having to start any of these dungeons over from the start in hopes that you can get through it without bugging could be a large issue. With the lower pop during testing I'm concerned with how frequently we'll see these show up
V14 - IMPERIAL NIGHTBLADE - DPS/TANK
V13 - BRETON SORCERER - HEALS/DPS
V2 - REDGUARD DRAGONKNIGHT - MELEE DPS
V1 - BRETON TEMPLAR - TANK/DPS
to be continued... Nevermind, no longer "to be continued"