You are all leaving out the most important ingredient, how the team does with him in, and how the team does with Sergio in. That's the bottom line.
From Nate's statements it sounds like the targeted long-term solution (maybe not this year 'cause we're still baking) is a pairing of Roy/Bayless and a pairing of Rudy/Sergio, leaving Blake as trade bait. If Steve was big enough to play SF we might be already have that situation. Pairing Sergio with Rudy sets Sergio loose to play his style of basketball, and takes the mannacles off. I'm looking forward to some exciting basketball from these lineups while Blake is out, but when he's well I think we'll be trying to play them all again, unless Steve is traded. Bayless would have to be a star overnight for that to happen this year.
Meant to be a bandaid all along, Blake has a knack for succeeding above all expectations.
He has been Bayless's obstacle all along, not Sergio. If Steve sucked, Bayless would have had more PT earlier, but probably not as he obviously wasn't ready for more than he got at the time.