Totally agree with the OP. We won a lot of games because we played tough. We played the Cavs tough. We need to keep that.
For the future, a Smart, AB, Crowder 1, 2, 3, could work. The D would be fantastic. The thing is, we would need a major improvement at the 4 and/or 5 offensively to make it work.
Sully is now entering a contract year. Now he probably will come to camp lighter and in shape. Now when it counts financially. He be worth his next contract or exceed it, but given his track record he is somewhat of a risk. Best bet is Sully comes in plays well and we trade him mid season and get a good asset.