The thing is - Götze has really only had 1 poor season (this last one, where he fought some injuries, got fat, and generally has been terrible - his confidence looks truly shattered). His first two years at Bayern he was basically at his Dortmund level and was excellent.
The criticism of him in Germany is largely from the fact he seemed to plateau - the expectation was that he would become one of the 5 or so best players in the world based on his early career, and instead he turned out to be just a very, very, very good one but not transcendent and not the German answer to Ronaldo or Messi. Unmet expectations frustrate fans, especially when the player doesn't always seem to be in the best shape (let's face it, Götze likes to carry a few extra kg from time to time). He also has never really had his favorite position to play at Bayern (#10 or even more like a 2nd striker, much like where vdV used to play for Spurs) with Müller and others taking up the same space.
He's an absurd natural talent, with close control, creativity and dribbling skills that are nearly unmatched. He's also never struggled before, so maybe this poor last year at Bayern and the ugly Euros experience has put a fire into him that he needs. If motivated, he's one of the best AM's in the world - a relentless attacking force who can pick through defenses find space for either himself or others.
If the deal can be done fairly cheaply (and it seems Bayern just want to sell him, period) and Poch can get his confidence back and his work ethic in place - he could be an absolute star, the kind of player that wins you the league. I think it's worth the risk.