I feel like this is one of those wide open years where every GM with a half-decent roster and a dollar to spend thinks they have a legit shot at a deep playoff run. No juggernaut to hide from, and the frontrunners in the standings have all looked beatable at various times this year. League is pretty wide open, especially out west.
Throw in the fact that Kyrie blew up the Brooklyn Nets and I'm not surprised there's a lot of movement right now.