I doubt they'd trade Vucevic for Knight, Vucevic has more value since he's younger and signed for longer. Ibaka only has value as an expiring contract in Orlando so maybe they'd be good with having a player like Knight for the next few years so they'd have something to show for trading off Oladipo. I know he's expiring but I wouldn't mind resigning him in the offseason and we'd have his bird rights to do so. If we could sign him for either as much as Knight makes or less for the next 2 years I'd be all for it. He's got about 2 years left of being a starter, maybe a little less, which fits with our developing pieces.
A pairing of him and Chandler could be one of the best rebounding and defensive front courts in the league until Bender or Chriss can actually earn a starting job rather than just being handed it because we have no other choice. Playing with Chriss and Bender in practice would help them a good deal also, I believe, because he's a good defender and would push them harder. Chriss shouldn't be starting right now, I don't mind him getting around 20+ mpg but he's starting because we have virtually no depth at PF and throwing him against starting PF's every night might be hurting him some as far as confidence and development goes.