I see what you're saying here, and I do agree to an extent, but I feel this is the case with the vast majority of center backs (getting the blame for 50% of goals conceded. It kinda goes with the job). I actually quite like Faes, as a defender, and I feel he is actually quite a bit better than he is given credit for.
However, him and Vestergaard, in a two, is pure suicide in the Premier League, and should never be seen or even considered.