FA: Kemba Walker to DAL | his knee is "not good"

[Kammrath]

the Mavs need an alpha in their GM role

I cannot agree with this more. The Mavs need a GM that can put the coach in his place AND Cuban. If Nico is NOT that then he needs to change or be removed. Of course, Cuban may prefer having an alpha COACH in place. Which I very much disagree with in the vast majority of situations. The only exception would be if that coach truly saw himself as a GM FIRST and foremost, more than a coach. 

Coaching MUST be secondary to team building IMO and fit within the team building vision. To put coaching above team building is to put the cart before the horse.