I recommended the RUU for a reason. It's not exactly the same as following the procedure in my thread, but it's close. However if you have issues, the RUU might fix them.
I tried running the RUU on 8.1 and after the Wizard pops up to extract the files, I never see the screen for flashing the ROM. The process just disappears.
Someone else had a similar issue with the white screen, and it turned out to be a bad download. Are you sure it's a good download?
I wasn't really having issues, other than the data connection issue that I believe got fixed with the latest zip. Would I get any different performance from just flashing the firmware to doing an RUU if i'm not having any issues? Given that i've downloaded it on 2 different computers with the same results, i'm pretty sure the download was a good one. I believe it has something to do with Windows 8.1, however I don't have any computers that aren't running Windows 8.1.