As far what changes...
Brunson vs IQ. Pick your guy and move the other one. We can't afford the luxury of carrying both. Losing either player would hurt our depth and bench performance, but if you can get an big wing like Anunoby to guard the big wings of the league, it's a piece this squad desperately needs.
Hartenstein vs Robinson. Pick your guy and move the other one. We can't afford the luxury of carrying both. If you make the first move to acquire a big wing who defends the other teams primary wing, that will help offset the loss of one of our big men. I love Mitch and everything he has meant to the franchise, but its no surprise that the top teams in the league all employ at least one stretch five if not multiple guys (Denver, Boston, Milwaukee, Philly etc etc) who defend and stretch the floor. While Hartenstein isn't a stretch five per se, he gets us closer to that ideal, allowing us to maybe move a guy like Mitch for something valuable. Or perhaps it's Ihart who is more appealing accross the league.
Either way we have a surplus at the PG and C. You take these strengths and use them to shore up your weaknesses and balance the team.
I really have no sacred cows. If it costs a Brunson or a Robinson to fundamentally change the ceiling of this franchise, then Leon needs to pull the trigger. If it costs IQ and IHart, i'll be sad but looking forward to the talent we get in return and what that does for the team as a whole. I like this team, but it has first round playoff exit, maybe second if we get lucky. Serious contenders we are not.