Originally Posted by Don Carlos
Patrick Stewart really made that character his own, and for me at least, his interpretation is now the definitive version across all media, including the books. As it probably is for most audiences.
So making him very English and very Patrick Stewart-y in this movie was probably the right move, IMO.
He was very English, but not very Patrick Stewart's version of Charles Xavier. Michael Fassbender, who played Magneto, did a much better job in playing a credible predecessor.