When I changed to BTU back in 7.0 beta, I just flashed the whole official rom, but whatever difference there is between XEU and BTU will be lost in the process. Maybe try with a different release.
Yea I did the same with the beta, I guess it wasn't Multi-CSC in the beta so had no choice but to flash that CSC
Now both XEU and BTU are basically the same firmware, both Multi-CSC so it just defaults to the phones original CSC, in my case, XEU
Think I`ll just hang on until it is available for download, then flash it with ODIN, just got it all set back up again, PITA having to go through that multiple times a day
Thanks