The only issue I see is Smart. I just don't see playing back up PG and SG as useful for the kid. Granted, he was a "BPA," thus, Ainge didn't take him to create a point guard controversy, but, he did and there will be one.
Ainge needs a star on the team. Rondo is the star and must remain except for this. The team Ainge is preparing to field has "draft pick" written all over it. Smart is going to play a "couple" of very strong games and the debate will rage that "the team is poor, start the rookie."
Everyone knows this, but, does it help Rondo's value? Rondo is a playoff point guard, perhaps at the trade deadline, as has been suggested here, there is an injury and a contender comes here for a starting point guard.
I offer the following "insider tidbit" from just such a conversation....the night of Paul George's injury, I was witness to a conversation between very senior Pacer's management literally at the moment the injury occurred. Very upset person, just lost the 2015 season. The following quote was fully in jest, but, it illustrates the point....."George is out for the season? (expletives deleted) Well, we have to get Rondo now..." No, I do not hang with big shots, this was a coincidence.
Perhaps, a contender's top PG goes down and Ainge will be there waiting for his pay day.
Prefer to watch Smart start, but, Rondo's value is only maximized by a desperate suitor.