The whole thing has been kind of a mess, to be honest. For various reasons.
One of those reasons being that very few people are bothering to go to Bracket Geek. I propose that we do this on PFA next time, using multiple choice polls. You can have 10 options per poll, so 4 threads should suffice for the first round. There's no harm in using checkboxes, because if someone votes for 2 people that are up against each other, then those votes cancel each other out.
EDIT: We could also make the polls public, adding an element of drama and making it possible to void votes by dupe accounts.