it depends on what tipe of use do you do with your phone... for example with stable you have great battery life and almost no bug, with beta you have all the weeks new features but maybe with some bugs...
I don't
i don't think that is xiaomi.eu fault, i think that xiaomi itself blocked the phone, try to ask to someone in en.miui.com, maybe they can help you because they work with xiaomi...
1)for install TWRP see here http://en.miui.com/forum.php?mod=viewthread&tid=224679&extra=page%3D1&mobile=2
2) you don't need to backup MI recovery because you can use this guide http://en.miui.com/forum.php?mod=viewthread&tid=147646&extra=page%3D2&mobile=2
3) if you upgrade from xiaomi.eu then...