Personally I'd like to bring both of them back but if choosing one it's Smart. The reason I'd bring Thomas back is I think Larkin would want more money, while Thomas would be looking to do something to help himself taking less. In order I think to even sign someone, I would like for us to trade Yabusele for a second round pick in a couple years. Nader can be release and not be held against us. Ojeleye I believe needs to stay on the roster and I think Theis is someone to keep for the year. With doing this the roster would look something like this.
Starting Five
Center - Horford
Power Forward - Tatum
Small Forward - Hayward
Shooting Guard - Brown
Point Guard - Irving
Bench Roster
Center - Baynes
Center/Power Forward - Williams
Center/Power Forward - Theis
Small Forward - Ojeleye
Small Forward - Morris
Shooting Guard/Point Guard - Smart
Shooting Guard/Point Guard - Rozier
Point Guard - Thomas
Point Guard - Wanamaker
Shooting Guard - Bird if we're able to keep on a two-way contract.
With having up to four first round picks next years, Theis, Morris, Thomas and Wanamaker would be off the roster. It's crazy when we have to look at how next years draft is going to affect our roster and could be in a large way if we don't condense our roster and picks. I look at Smart as a must sign because he can play really three positions specially with playing defense against small forwards. Same with Rozier that should be signed next year to an extension as he can play the point or two guard if we go small.