After playing Disgaea I can definitively say larger numbers is a bad direction in which to be heading in. When you are hitting for 10000000 + on a regular basis it becomes extremely difficult to keep track of how much damage you are actually doing. I know I have miss estimated the damage being thrown around simply because I didn't get a chance to count the decimal places before the number popped off the screen.

Imo, they should be designing battle systems where the damage cap isn't a relevant factor. Like Chrono Trigger.