I think 64's a fair grade, and this one's a solid example of that number. Maybe even "high-end" for a 64. It's as important to evaluate the photography as precisely as the coin in cases like this, and I'm seeing the marks on the cheek being somewhat downplayed by the imagery. Not that they're all that prominent, but enough to make it a 64 rather than higher.
Like the overwhelming majority of Morgans, it's obverse-limited but you can't consider that for the grade. In all cases but that of severe strike disparity, the grade is the lowest face. Not an "average." It's that simple.