Exactly as Krazy said. More powerful but boring. It's not as if filler ever stopped Ichigo from showing something new.
In the Amagai arc he compounded one getsuga then carried a second held onto his blade.
Which is a trick he wasn't even supposed to use till he fought Ulquiorra. Some 20 episodes later.
This filler arc is the closest thing to manga as filler can get and since the others showed off new abilities never before seen. Such as with our heroine Rukia With Shiraiyuki. They could at least give us something for Zangetsu. Well at least Hichigo helped the old man save face.