Wiggle your panes around.
super+m, super+arrow: Push pane in given direction(ie expand)
super+m, arrow: Pull pane in given direction(ie shrink)
Quick shortcuts for speedy things(ie, 50%)
Keep other panes sized proportionally(currently just removes space from neighbor)
Make sure that pane does not fully overlap another(ie, a row of [0.0,0.2,0.3,1.0]->[0.0,0.5,0.3,1.0]) and instead will shift others to make room(ie row [0.0,0.2,0.3,1.0]->[0.0,0.2,0.5,0.6,1.0])