wow. I've been looking through uu teams to see if i could find one to inspire me in uu. and this looks like a great idea.
only suggestions i can think of would be timid heracross
and also, a mixed sharpedo set.
while sharpedos special attack may seem weak, fully invested, it gives you a surprisingly powerful hydro pump and ice beam. which is backed up by a crunch or earthquake. best of all is that because of speed boost, you don't have to invest all 252 of your other ev's into speed. which leaves you plenty for attack.
it plays somewhat differently than your current sharpedo, but i find it to be very strong