IMO Good gameplay w/ bad story can work.  Good story w/ bad gameplay can't.  With BG1&2 you got both which is what made it great.  I think BG3 is decent gameplay and good story.  The decent wil be improved.  That said, I am dumbfounded that no one chimed in with a different experience at the grove.  I got pissed and killed Kaga? Karga?  too, but my experience was VASTLY different and things changed DRAMATICALLY.  
Nettie joined in the fight against me.  When I left the grove the tieflings had slaughtered all the druids.  Wyll died even though he was in camp.  When I later tried to free Haslan, he had escaped.  After killing the goblin bosses, Haslan  understood why I killed the druids and said it was his fault and that he shouldnt have left.