changing WTF file ? that's old news mate i used it to play on some private servers before i join EU , it's actually the only way to play on private servers ..
i got the US version of the game with the "WTF stuff" of EU , including patch list and i never got any problems so far , in fact if you leave the patchlist as US and you play on EU servers , patch will be downloaded about a week before EU ( since US gets their patches 1 week before EU ) and you won't be able to join EU servers for a whole week until EU servers are updated to the newest patch..
i got the US version of the game with the "WTF stuff" of EU , including patch list and i never got any problems so far , in fact if you leave the patchlist as US and you play on EU servers , patch will be downloaded about a week before EU ( since US gets their patches 1 week before EU ) and you won't be able to join EU servers for a whole week until EU servers are updated to the newest patch..