mirotic looks nice, he's almost certainly going to be a decent NBA player, but that doesn't mean he'll be a star. he's currently 23 1/2 years old, in the last few years in the euro league, he posted a nice 50% shooting and ~45% 3pt. percentage.
his per36 numbers are 19/7/1.5/1.2st/1.1blk - nice stats, but considering it's the euro league, it doesn't necessarily mean he'll be a stud in the NBA.
mcdermott is another nice prospect who looks to be, at worst, a solid NBA player.
gibson is of course a very good role player who is probably at the peak of his career.
if flip likes the thompson package, then he should love this one, i think both mirotic and mcdermott have a good chance at being as good as thompson, and they'll be much cheaper in the next few years. but personally i'd rather have the cavs package with the top prospect, or the c's, with smart and lots of extra picks and prospects.