I've allready established that his powers aren't Miracles, but did you know that even with the non existant miracles on his side, He has failed to do anything more than mildly inconvenience the characters. In Chapter 655, he managed to beat down Renji, Rukia, Byakuya, Momo, and Shinji without any trouble. Later, he beat up Kenpachi. Only problem: He did nothing.
In Chapter 673, Renji and Rukia are back without a scratch, Byakuya and Momo were allready up, and Kenpachi didn't even go down to Gerard himself, rather going down to Yachiru overusing his Bankai (And even then, he's still active). And chances are, Shinji's still fine. And it would take some kind of Miracle for Momo to defeat him.
Oh, and Ichigo really should have gone Bankai and Getsuga Juujishou right at the start of the fight. It wouldn't work either, but at least he would feel good about himself before he died.
In Chapter 673, Renji and Rukia are back without a scratch, Byakuya and Momo were allready up, and Kenpachi didn't even go down to Gerard himself, rather going down to Yachiru overusing his Bankai (And even then, he's still active). And chances are, Shinji's still fine. And it would take some kind of Miracle for Momo to defeat him.
Oh, and Ichigo really should have gone Bankai and Getsuga Juujishou right at the start of the fight. It wouldn't work either, but at least he would feel good about himself before he died.