Raising the amount of units you could bring into battle would help your stats and rightfully so. However an addition or another fix to the problem could be to change the points system. Allow the level 200 people who attack level 200 people to receive more points. Why would I level up when I score more points from attacking people at a higher level than mine? My level is much higher with the addition of decent LTQ's and the Raid Bosses will increase it even more. However as long as my points decrease as my levels increase I will only level to receive units from LTQ's.