At the very least I think Kemba is the one piece I would definitely include in my team and build around for next season. For me he can become an excellent PG.
As for the other pieces I think Biz and MKG at C and SF should suffice. I think both have high enough ceilings to develop. But we need to add more scoring power. I like the look of McLemore or Monta Ellis coming in at SG, though Hendo at the right price might be an option. Then ee will probably keep McRoberts at PF or draft Noel if we don't go for McLemore or another draft pick.
Overall no one is safe at the minute, and outside of legit superstars I think that is generally the case. But at the very least I'd keep Kemba at the heart of the team for now. The other four places are up for grabs.
Apologies for mistakes in previous version. They were honest and stupid mistakes.