I've had the same thoughts. I don't understand it. It's not like Mitchell is a high usage guy who dominates the ball. And Fox also doesn't dominate the ball except at times in the 4th. Fox is tall enough to guard a lot of SGs leaving Mitchell to guard the smaller point guards. So why can't it work? This is starting to remind me of the Halliburton-Fox backcourt that had people scratching their heads why Halliburton wasn't more aggressive offensively.
Btw, I think that's a big reason why Fox/Domas have been so dominant offensively. Domas has fully bought in to working off of Fox and getting him (and the rest of the team) great looks. He's perfectly fine taking 8 shots a game while we go score 130. I mean, how many interviews has Domas said that he tells Fox "Hey, it's the 4th, you need to get going. I'm going to get you open". Insane mentality from a 3-time all-star.