Agreed, our Cooper is great, but 2 doors and 4 seats will be a bit challenging with 2 (or more) kiddos. The Aceman is on our list to look at in the coming, assuming it comes stateside, which it seems quite likely it will...
The only thing we are concerned about with the Aceman is that cargo space. We love the size of the car, but only 2 additional cubic feet is slightly concerning, especially when comparing to other vehicles of the same size (though they are
ICE... blech, never again) which have over 50% more cargo volume than the Aceman. We haven't had too much struggle with cargo yet - though certainly have had to be cognoscente of it - but if we want to go camping with all the kiddos and the pooch, that may become a struggle.
Hopefully that doesn't force us to the Countryman... that thing is '
uuuuge, and weirdly still has less cargo space than some of the vehicles in the Aceman's size class (e.g. new countryman has 16ft3 of storage, Honda Fit has 21ft3; a more direct comparison for the Countryman is the Honda CRV has nearly 2.5x the cargo space at 39ft3 compared to the Countryman).
I wish they would make a the Clubman an EV. that would have been - literally - perfect. Low, reasonable length, 4 doors, lots of cargo space (more than the new Countryman???). Win all around. No one is making wagons or anything that size in an EV though - that I am aware of. heck, no one is making wagons ICE or otherwise. ugh.