.. especially if Andre and Dawkins play at the same time
I think you meant Rasheed, correct?
Personally, I don't know that the lineup you mention is all that impressive.
Mason/Marshall - Pretty good starter, but unproven rookie at backup. Big drop off if Mason gets into foul trouble
Kelly/Hairston/Gbinje - Nice matchup 4, but you lose a lot of rebounding. Hairston/Gbinje very much unproven.
Muhammad/Gbinje/Alex - A top talent for sure, but downside is you have 3 freshman at that position.
Curry/Suliamon/Dawkins - Deepest spot on the floor, although Curry and Dawkins have defensive liabilities
Cook/Thornton/Curry - Decent rotation if Cook is healthy. If not, we're pretty thin.
So essentially, you have this year's team, but you trade Rivers/Miles for Suliamon/Muhammad. That's an upgrade, and everyone else has another year of experience. However, even with Shabazz I don't think this team is as loaded as UNC or Kentucky was this year. One thing that scares me is that with or without Shabazz, we lose 4 rotation guys at the end of the season. That's a lot of holes to fill, and losing another one-and-done could mean replacing our entire starting 5.
I'd really like to get another stud in this year's class, be it Shabazz, Parker, or Amile. If Shabazz is a true one-and-done, not sure if I'd rather have Amile or Parker for the longer term.