Weakening the characters makes them more heroic? Nifty. Next time I make a fighter PC, I'll give him Str 3, and arm him with a strand of cooked pasta. He'll be the most epic heroic fighter ever!Toj said:
But to me limiting their ability score maximum makes it that more challenging... it makes them truly 'epic' or 'heroic'.

Seriously though, epic characters are supposed to be larger than life. Above level 20, you're outside the scope of even extraordinary mortal humans, and into the realm of truly legendary or mythic heroes. It's like exchanging a Batman comic for a Greek myth, where Hercules can divert the course of a river all by himself in a single day.