I was reading some of the messages on here about the difficulty of the game, and some people's opinions is that it ramps up too fast. I have a possible suggestion to "even it out" for players, and please forgive me if this has been discussed before. How game breaking would it be if, instead of only getting experience after each adventure, you got it after each battle? You could split up the XP you get for the whole adventure among each battle. Or at least give SOME XP for every battle, and then a bonus at the end of the adventure, so there would still be a decent incentive to play all the way through and use continues and stuff (and pizza to resurrect.)
I think they wouldn't do this for the same reason they don't let you replay lower level adventures for exp but i personally like the idea of exp per mob based on how strong the mob is. That doesn't fit with there 20 exp per level plan i get that its just what i would prefer.