I'm glad Smart is getting this early starting experience, and I'll be glad when we see Rondo showing how well he can fit into Stevens's new system. If the C's trade Rondo midseason, I'll be fine with that. If re-signing Rondo comes with their bringing in a veteran center who can help them win next year, that'll be fine too.
I don't worry about Stevens robbing Smart of sufficient playing time once Rondo returns.
About the only thing I'd worry about would be Rondo not fitting in and them signing him to a honking max extension this summer without otherwise being able to construct an instant contender. Except I don't think Danny would fall for that.
All is good.