Yup, Metacritic has a very American bias. Most European reviews, especially non-English ones, which Metacritic rarely covers, have been far more positive. I expect the sales to be more similar to ones of European RPGs, like The Witcher, than to American AAA titles, but I doubt it will be an actual flop.
And citing the 30k figure as indicative of anything is silly, considering what the figure actually represents (console sales only in a largely PC-centric market in just 2 days).