Hey Dustin. Like always, a very nice review! I purchased this lens over a week ago and I have the same experience as you do with this lens. I find that with VC turned off, the autofocus seems to be as fast as the Canon 85 1.8 however, with it turned on, it sometimes hesitate to focus, but is still fast. I love this lens though! I'd say it is the best bang-for-buck 85mm out there with Weather Sealing, Fast Focus, 6 Year Warranty, VC, Very Sharp, No Purple Fringing, Great Build Quality, etc! A fantastic upgrade from the Canon 85mm 1.8.
By the way, has Tamron confirmed a release-date for the TAP-In Console?