Sometimes the afflictions didn’t trigger properly like accidentally healing an enemy because decay was applied same turn etc. also turn order and initiative is impossible to predict. In a 4 person co-op game there must always be an alternating turn order regardless of number of players. So basically we’ve had players skipped for two whole rounds because the AI gets to go again. It’s fairly consistent in that regard. It’s frustrating because it’s usually a different person each session that just gets entirely skipped over for almost the entire fight.
And to be honest, I liked the action/bonus action mechanic as it makes the turns go faster. We just did a 4 player bg3 campaign earlier this year and the fights went way faster.
And the crafting mechanic has a high learning curve.
I did find the physical/magic armor mechanic different. I don’t have any real opinion either way with it.