I voted NO; however, I am predicting it will pass 55% to 45%.

Too much money on the table for many people to pass up. Also, as time has passed from the initial release of the TA many, many pilots I have flown with and talked to have softened their initial stance and are not afraid of the codeshare language or the subsets.

The reason I have most often heard regarding the softening views and hence leaning YES votes are:
1) Lot of money to leave on the table. Better to win the long term game with singles and doubles than always try and get a home run.
2) Codeshare -- not afraid of it since: a) NO domestic codeshare b) ALL north/south trans-border flights have to be flown by SWA pilots c) All East/West codeshare flights, i.e. longer range than 737s have to have a leg flown on SWA metal once they get to the U.S.
3) Subsets -- very costly to the company. Actual overlap will be very small. First MAX in 3Q17 while we draw down the Classics. Will be a relatively small overlap and for a relatively short time.

I don't necessarily agree with the reasoning above but I am starting to see more and more guys soften their tone and appear to be leaning towards a YES vote. Just what I am seeing and hearing on the line and also in the crew lounges.
We will all know in 5 days.