Hmm, it took me only a couple of tries, the key is to stay way ahead of the zeppelin and just keep moving and blasting. Your powers are upped at this point so make sure they are all slotted and that you're using your heal. Oh and save the big power you're given for the clusters of weapons, don't waste them on single weapons if you can avoid it.
Good luck.
I do agree that it was anti-climactic, however.
