My only Shadowbringers dungeon experience is with the first one (Holminster), but yea, the HP on the trash mobs could be toned down a little, bosses were fine enough. But it is far from the most worst example of that problem that the game has had... I would use Ridorana Lighthouse as a prime example.

Just weeks before the launch of ShB bosses still took forever to die, the hardest thing in that raid was trying to not fall asleep from boredom midfight.