I agree, the shadow druid plot just somehow burned out. We have two druids in teh group, one of them with no plot whatsoever in act 3 (Halsin) and no follow up on teh shadow druids? I know, a city is not their usual haunt, but there could have been special circumstances (destroying teh enemy from within).

And Omeluum should have been the obligatory mindflayer at the end of the game, if rescued

"We are all stories in the end. Just make it a good one."

Doctor Who