If anyone is curious if this works on the latest build, here are my findings.....
I updated my GALAXY Tab S 8.4 Wi-Fi (SM-T700 XAR) via odin from SamMobile site.
Model name: GALAXY Tab S 8.4 Wi-Fi
Country: Cellular south
Version: Android 4.4.2
Build date: Wed, 05 Nov 2014 11:44:24 +0000
Product Code: XAR
Once first boot completed, I followed the cf-autoroot instructions and achieved root on first try.
Haven't run into any issues over the past few days.
You were one of the lucky ones.
Have tried this on 2 tab s 8.4's in the house with the Nov. 5 build same as yours. It's a no go.
Tried the official CF and Bean's scripts, different driver packages, downgraded odin back to 3.09.3, was using 3.10 to no avail.