I don't think anything other than a minor deal (if any) will happen this year. If one happens, the goal would be to fill Darko's spot and maybe one other by shipping out the guys not seeing court time like Collins or Joseph.
I really think that with the core signed for 2 more years, Danny and Doc will be using this season to get this team functioning together (while making as good a championship run as possible) while gearing up for 2 real runs the next 2 years.
From what I've seen, the 2 biggest issues are lack of understanding of the team defensive sets and a over-effort to be the good teammate on O and overpass/defer to other players. I think this will improve by the end of the year. The question is will it be enough of an improvement this year or will we be saying 'wait until next year'