I'm the original LaTeXTools author. Good news: I'm in the process of producing an "official" port of LaTeXTools to ST3, which no includes westacular's super-good ref/cite completion code. Bad news: I've only just started Of course, I'm drawing freely from phyllisstein's EXCELLENT work, so things will move on quickly, I hope.
I didn't pull in phyllisstein's code directly because (1) he added a few things (e.g. different directory for aux files, other previewers) that I'd like to do differently and in any case later, and (2) some of the recent fixes/additions would have required further work merging. In any case, I'm consulting (make that cut-and-pasting) phyllisstein's code extensively!
You can follow what I"m doing in the 'st3' branch. WARNING: right now things are basically still broken, so keep using phyllisstein's port for now. I'll let you know when you can start pulling my branch.
phyllisstein, I've already thanked you in private, but I'll do so publicly now: THANKS!!! I'll have several questions and requests for you soon
Thanks for your patience! M