Lee/Terry/Crawford (some combo) have to go this offseason for preferably a big. Writing on the wall, that depth is just not needed and is a detriment.
I think you're right. You could also add Williams to that mix, and then things get
really crowded. I like Jet, but he's probably gone (because of his age and the fact that he's one of the lesser defensive players in that group). Lee can be quite good defensively and hit threes, Williams seems to be good all around with lots of room for growth, and Crawford still has the potential to be harnessed into a great offensive threat. I think it would be nice to head into next season with a backcourt rotation of Rondo, Bradley, Lee, Crawford, and Williams, plus Green and Pierce on the wings, and KG manning the middle, flanked by Sully and Bass. I think Danny's gotta find a way to turn draft picks/JET/Melo(possibly Bass)/filler(Shav,White,etc.) into a guy such as Gortat. A frontcourt rotation of KG/Sully/Gortat, plus possibly Bass and/or Wilcox, would be solid.
I agree that Green should start. He's playing starter's minutes anyway, and he's currently providing the most scoring punch on the team, so have him in from the get-go to get things going sooner. (see what I did there?

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Pierce and Green seem to be playing quite well together, and having them in at the same time also seems to present quite a few matchup problems for opponents.