I always use large, i feel its how the map is indented. I never play freestyle so I dont need a .3 second speed advantage.
I also think there should be a larger size, similar to world 2.0 so we can have maps that are more epic for the players who like big long complicated games.
CC is already involved numerous clicks to make a move, especially if you have BOB's auto confirm, so an extra click to scroll a mega map doesn't really make much of a difference to me.
Lack should consider modifying the website format to include larger size maps without scrolling, this is called progression.