Where should the developer team make improvements?
Add seperate audio bars for "Combat Sound Effects" and "Environment Effects." I'm tired of having my eardrums blown out or if I turn it down, cannot hear the lovely background sound effects anymore. It sinks and it not worthy of a game engine made in the 2000's
More monsters?
Definitely. Origin Age stank the big one with it's lore. Skeletons are DEMONS, Zombies are DEMONS, the fade is DEMONS, mages are about DEMONS, treants are DEMONS, spirits are DEMONS, dragons are DEMONS, darkspawn are led by DEMONS, everything is DEMONS, your mum is a DEMON, it's all about DEMONS, you have to poo because of DEMONS. DEMONS DEMONS DEMONS DEMONS DEMONS DEMONS DEMONS DEMONS...
Ahem. A little more variety in the lore would have been nice...
more classes?
Absolutely.
What was D.A. O. lacking?
Option to globaly disable all gore. Options for more audio bars so you can lower the obnoxiously loud combat sounds.
It's a great game but is absolutely no spiritual successor to Baldur's Gate 2. BG2 didn't need to resort to excessive gore to win sales and it's background had almost infinite variety, as opposed to DEMONS DEMONS DEMONS... ooops...
BG2 swapped between light and dark. Dragon Age is always dark and depressive, it's almost like the designers want you to commit suicide due to how dark and depressive the atmosphere is.