I've mentioned most of the logic in chat before, but even though it's obviously irrelevant at this point, I do vote UU.
It's purely pragmatism. If we were in December 2008 instead of 2010 I would look at this differently. I've never been hugely interested in the suspect characteristics. They're useful guidelines, but they're by no means hard and fast rules we should be following. By the characteristics, Heracross is absolutely BL - he's one of the more powerful, gamechanging offensive suspects we've had in UU.
The reason I vote UU in spite of this is because this vote isn't so much about a Pokemon as it is a choice between two metagames. BW is no longer just knocking on the door - it's already broken in and is passed out on the couch with some loko. This is the last vote we'll have for Gen 4 UU, and as such it is effectively a choice between two metagames - the Heracross-centric DPP UU we have right now, and the Venusaur-centric DPP UU we had before it. Given the option I would prefer to remove both Pokemon to best balance the metagame, but with that option not being supplied to me I think that the metagame containing Heracross is a more enjoyable metagame than the one with Venusaur, and would be the better choice for what will from now on be DPP UU. It's as simple as that to me.
As voters, I think we have a responsibility here to give the people playing UU as enjoyable of a metagame as possible. I don't think one metagame is anymore competitive than the other, so to me that's the question. To me, the Heracross metagame is simply more fun.