I would simply begin with moving the game towards 5e rules further. Coming at it completely unbiased, I was initially put off by the way combat started in the game. Not much going on, lots of waiting. By the end with a full party, there was plenty to do, so I didnt mind the turn based at all.
Since that IS what we will have almost certainly, lets just clean it up.
It would be nice if we could speed up the combat process. Waiting on all of the other NPCs during large fights and them "thinking" for 30 seconds makes me want to pull out what little hair I have left.
In my recent play through I've noticed that the AI is moving faster than in previous patches.