I think Alex Len could be a valuable piece, but I think his feel for the game is absolute garbage, and I haven't seen it improve. He lacks confidence, he has been jerked around by his coaches since year 1. I think if they'd never signed Tyson Chandler the Suns would have extended Len. But they didn't. Cuz they're the Suns.
On paper he could be an elite defensive rebounder, an agile and willing defender, and at worst a rim runner, but he's got some touch too.
But in practice he's wildly inconsistent when you give him any leash and even his motor, which was his calling card early, doesn't look that great. Alan Williams basically did everything Len does better a year ago and basically forced him from the rotation.