Well here goes , going to upset some people , but we're all entitled to our opinions.
Haven't driven either the F Pace or the GLC so unable to comment on drive, engine etc but the F Pace looks more "masculine " and balanced whereas the GLC looks odd from some angles and would look more at home on the school run than going cross country. Similar to the difference between an BMW X3 and an BMW X5 .
Not me, you are describing exactly the reason why we got ours. My wife wanted a 'feminine' vehicle, not something that looks like a mans car.
I'm not with you regarding the X3/X5 I think both will weep and hide behind a tree when they see a little bit of mud But at least they are good on the road.