Just rooted an Xperia ZL C6506 to Android 4.3 using Bin4ry's v.36 root kit!
I have my 2nd unlocked Xperia ZL C6506 phone (after the 1st one fried)! I upgraded the OS via OTA to Android 4.4.2 and then 4.4.4. The phone kept connecting to Baidu servers on a constant basis but only when on LTE in California. I would then delete the Baidu folder created (sometimes every 3 minutes!) The phone kept connecting to Baidu servers and the Baidu subdirectory kept getting created on the internal SD, the phone kept rebooting every 3-5 minutes and it kept overheating.
I finally got fed up and rooted my phone yesterday, using Bin4ry's v.36 rooting toolkit. I'm on Android 4.3 now. I originally tried the firmware 10.4.B.0.569 which performed better in terms of battery life and phone temperature, as well as the Enterprise Service not starting (in Security | Device administrators). I got greedy and flashed the 10.4.1.B.0.101 firmware (still Android 4.3) since it's newer. I noticed the Enterprise Service getting selected after rebooting, although I turn it off (uncheck it.)
Regardless, this rooting method saved me lots of grief and worked great. By the way, I tried all the options of the application, and the one that worked was option "0) New Z2 Root Method by cubeandcube (thanks man!)" [I think the developer's ID is actually "cubeundcube"]
Thanks Bin4ry for an awesome application!