Yes, i just finished and it's working :)
I did a local backup in sd card, flashed version 6.3.3 with Miflash, you can find Miflash and the fastboot rom here:
http://en.miui.com/thread-126437-1-1.html
Flashed TWRP 3.0.0-1 with Updater app
then update to EU 6.4.7 and restored from backup...