Ok, here's a suggestion for you. If you're not looking to play with points balanced characters, how does something like this sound.
The Fate system for the Dresden Files uses a scale of success that runs thus
Each characters abilities are somewhere along that scale. If you don't have an ability, it's considered Average.
For tests, you roll 4 Fudge dice. These are dice with 2 + symbols, 2 blank faces and 2 - symbols. If you use normal 6 sided dice, a 1 or 2 counts as a -, a 3 or 4 counts as a blank and a 5 or 6 counts as a +.
Rolling 4 dice give you a result between - - - - (-4 to the scale) and + + + + (+4 to the scale).
As an example, if I have a skill rated as Good, and rolled +, -, - and blank, my end result would be Fair (Good -1).
Would a system like that suit your game?