If he does opt in, can we then flip him immediately next summer? He will be an expiring.
Also, I'm not sure how much we've really improved this off-season. I mean, on paper, sure Mo and Marvin sound better than Harris and Miles/Bell/Howard but let's not ignore the fact that Marvin's three point percentage could be and likely was an anomaly last season, that Mo doesn't really seem to fit in an up tempo style (which we should utilize) like Harris more or less did, that this could mean more playing time for Burks which sounds great and gets me excited but the fact remains he still has a lot of work to do, and maybe most importantly, that chemistry matters. These could be some solid moves but only time will tell.
In brief, I'm on the fence with how I feel about our two moves thus far. The change is sort of nice so if I had to choose, I like them. But it could handcuff us next summer and really isn't leading us to contender status. So who knows. Maybe Marvin will age well and evolve into a long, semi-elite defender or something.