Oh I certainly understand it wouldn't fit in the game in it's current form... But then I think that is more of a balancing issue with mob strength than anything else.

My rank 20 PGL can solo rank 34 dodos, even though the sp returns cap at rank 30 mobs, at this point they should almost scale the ranks down so that rank 25 mobs become rank 20 mobs, but they keep their current sp values and difficulties.

Of course I have no idea how higher level mobs behave so maybe it balances out the higher you get.