Personally, I think its best to continue to vote no and let them shut the place down. Then at least you know where you stand. If you are an FO at any seniority level, bail now and get your 1 year upgrade anywhere else. If you are a Captain, ride it out till the shutdown, hopefully you will have been picked up by a mainline carrier by then.
There is zero incentive to voting yes other then keeping the airline afloat for some undetermined amount of time. It's going to close down one way or the other.
Voting yes doesn't do a thing for you, it doesn't add any airplanes, it only replaces what you already have. And that's not even until 2016 which might as well be 20 years from now.
Voting yes puts you in the same boat as Endeavor, meaning nobody wants to work there. You have to be able to attract FO's which this does not do. Everyone already knows the E2D didn't work.