Godge? I assume you mean Götze. Well, when he played for Dortmund he was an elite talent, he was - in my eyes - the biggest Talent in Bundesliga. He was the kind of player that could decide games. Consistently. At his age. He was never a world beater when it came to speed, but he could take any defender 1v1 and beat him. He had vision, passing skills and even scored quite regularly. Since joining Bayern, nothing really was the same. The injuries and not being in his comfort zone really took a toll on him. Most of the time when playing for Bayern he just disappeared. He became more unathletic (don't want to say fat because he obviously is still a Professional Athlete) and slow. He just regressed. Of course he still has the technique, but he has had no impact on the game most of the time. He couldn't beat defenders 1v1, didn't score... I don't know if he will ever get back to the form of his Dortmund days, but he definitely failed at Bayern. He seems to me like a sensitive guy, maybe the change of scenery will help him. I don't think Juve would have been the right place for him though.
Hummels... He is an elite defender in every sense. He has vision, passing ability, good header, wins a lot of duels and sometimes even scores. The only thing you could say is that in the last 2 seasons, while having a few injuries, his level of concentration dropped a little. You could see it when we played them in CL, he had 1 or 2 blunders. He was usually not the guy for those kind of mistakes. That was more for Subotic. Before that horrible season Hummels was consistent as a rock. Seeing him boss it (except for that stupid penalty) for the national team, I think he will be extremely motivated and valuable for Bayern. I actually think he will be better than Boateng.
Well and Khedira.. I really liked him as a player in Stuttgart. He was very good even back then and really deserved his transfer to Real. He was never really a flashy player but a very good and consistent one. So not really the kind of player the Real supporters rate. I was wondering back then how long that relationship would work out and I was very happy when the deal for him was announced, as I rate him very highly. If it wasn't for his injuries he would be irreplacable in our midfield.