Horrified when I first read this, but after some thought, I love it! It's a gamble, yes, but we're not winning it all anyway this year. Probably not for the foreseeable future, so why not take a shot!
You're getting something we have NONE of---a great rebounder! You're getting something we have almost none of---SHOTBLOCKING! As much as I like MS, he's not exactly critical to our team with our crowded backcourt, and as mentioned TRoz is IMO ready to take those minutes. Amir, while playing well for us last year, is still rather frail, and not really crucial to our plans---heck, we weren't even convinced he'd be resigned this year.
Now losing Jae is a concern, and IMO this is where the whole deal hinges. You've gotta be convinced that JBrown can handle SF. And is this DA's master plan to finally get Abdel Nader on the team, to team with JB and handle SF! I think it's a wickedly ingenious plan, with more upside than down!