I really DID enjoy Yoda's fight scene. Others I know hated it ("he walks with a cane, but then he can flip around like that?! Nuh-uh!" or, "It was just stupid,", or "It was funny as ****, but unbelievable.")
Before this point, Yoda was "respected", but really only as a figurehead of the Jedi Order; he had shown "authority", but not really "power". I thought it was HIGH time everyone knew just how powerful he was (he ABSORBS force LIGHTNING?!?!?!! Wow!!!) His "wigging out" with the saber - I thought - was a good testament to how the Force can overcome the "impossible", ("Do, or do not. There is no try.")and how powerful one CAN be when attuned to the force.