As long as that doesn't become an argument on itself to waive away critics I do not see why it would be a big deal whether or not a theory is terribly complex. There are plenty of other theories that require a really good understanding of the mathematics, physics and theory behind it to really be able to comprehend them. I think the only thing really making this 'more' complex if you like is the fact that it tries to merge theories of different scientific disciplines. It's not a surprise that this isn't exactly easy to do. Somehow the almost mythical character this theory gets slapped on is misplaced in my opinion,

(btw. this is just a general rant)

Cheers