Forgive me if this has been said before but if I, a 6ft human, stand in a doorway the top of my head is a few inches away from the top of the doorframe. If I were to scale myself to the size of a minidoll there would be a similar amount of space between me and the top of a 60596 doorframe; whereas if I was scaled to a minifigure there is a much greater, unrealistic height. I use this comparison to say that any WIP building I make would have better, more realistic proportions and look visually more appealing if I build at minidoll scale.
I rarely create MOCs that aren't going to look visually comparable to objects, buildings, ect. in real life which is why minidolls help me scale things down a lot easier. This is just my opinion because I have a particular reason why I prefer minidolls and doesn't mean I don't enjoy minifigures; minidolls just suit my needs better. That's why I think Lego would be better to continue minidoll scaled creations into the future because buildings would look more realistic.