I do still fear Rondo going to Brooklyn a bit. He's obviously not 2012 Rondo anymore and not really a good fit with the modern NBA, but he'd do just enough to get the Nets out of one of the top-two worst records in the league.
He was -1.3 in On/Off Differential last year per Bball Reference; Jarrett Jack measured in at +1.9. Rondo to the Nets would be a fantastic development for the pick.
I wonder how much of that has to do with him playing major minutes with Boogie, though.
Boogie was +6.8, and they played about 1800 of Rondo's 2500 together. So when Boogie was off the floor and Rondo was on, Rondo was terrible.
So yeah, roughly 60% of their minutes were together, and if I remember right, DMC's on/off splits are some of the most lopsided in the league. So that's at least partially responsible for it, though Rondo is certainly part of the blame for those splits, too.
Defensively it's a wash between the two anymore with both of them being below average defenders right now. Jack provides more shooting and Iso offense, but I'd worry a bit about Rondo getting Lopez some easy looks. They'll have some really poor spacing with him, though.