I think the only place in Europe that the Mavic 3 Pro makes sense for is the UK, where it would have the same restrictions as the original Mavic 3 and Mavic 3 Classic. Not to say that it makes sense for the UK necessarily, just that it makes as much sense as the earlier two versions!
Not being being able to overfly people in the EEA (even if you have the A2 CofC) would be too much of a disadvantage to me. Without the A2 certificate you'd need to fly the Mavic 3 Pro no less than 150m from uninvolved people and structures — basically impossible in Europe. The certification process itself is easy but it is an extra €150 (and a bit of a hassle).