Classic high risk, high reward move by the Nets. They lost a lot in terms of depth and picks for the opportunity to have the best version of the Big Three involving current NBA superstars - assuming they also resolve the issues with Kyrie. Harden should make up for the loss of Levert. And now that Harden is playing for his preferred team, I'm sure he will be back to playing at an MVP level. The Nets will also probably make more moves - they only have DeAndre Jordan at center.
The Rockets should be okay. They lose a lot even with Oladipo now on their roster, but at least the distractions created by Harden are out of the way and they've acquired a lot of picks (low ones though if BKN fares well in the years to come). Wall, Oladipo, Wood, Gordon, DMC - not bad. They can also flip Tucker for a better PF.
The Pacers should also remain competitive in the East. Levert should fit in nicely, especially while TJ Warren is on the IL.