Hard to know what to think here with so many moving pieces.
Houston did well considering they had to move Harden asap. Oladipo with Wall, Boogie, and Wood looks like a good team to me. Clearing out all the Harden drama should give them a lift and they're playing with house money (someone else's draft picks) now. I actually think they get better and remain in contention for a playoff spot this year.
The Nets... uh, why? You already have the biggest ball hog in the league so why not grab another one? How long is it going to take before Kyrie checks out and starts lobbing quote grenades to the press? Or has that already happened? Giving up LaVert and Allen too... well, at least they can count on selling a bunch of tickets this year, oh wait. No, that's not happening either. So they doubled down on all the money they spent on Durant by spending just as much on Harden. If this doesn't work, someone is getting fired.
Indiana apparently was desperate to move on from Oladipo so they got LaVert instead. Might be a wash. Historically Oladipo has been the better defender but that was pre-injury and he hasn't looked like he's fully recovered yet. Also his contract was expiring so the swap is probably a plus for them.
Cleveland is in the same boat we are right now. They have some nice young pieces and they're searching for an identity. Collin Sexton has been playing out of his mind this season. There seems to be no end to Kevin Porter's off-the-court issues, but when he's actually able to play basketball he's an assassin. I think that's a really underrated back court. Then they've got Okoro and just added Allen. This team could take the leap sometime soon into playoff status. Also Drummond is an expiring contract so Allen gives them a younger replacement (assuming they re-sign him, of course but that should be automatic).
Out of all of this I think Brooklyn comes out the worst and they're the ones that just acquired a superstar. Houston, Indiana, and Cleveland all made moves to prepare for the future and the Nets essentially flushed their future down the toilet for a lottery ticket. The Eastern Conference playoffs got a little more interesting though. I also think Philly made a mistake here in not grabbing Harden while they could. Simmons is a hard player to build a team around.
EDIT: If the NBA was a 3-on-3 league though, that Nets lineup would be legit!