I'm not sure if this dice mechanic is used else where, but on paper I like the way this scales.
The Player rolls 1d6 for initiative then rolls a 2nd d6, (or more as you level up) for attack. If any of the attack dice are higher than the initiative die, subtract the initiative from the total of the attack dice.
For example: the init roll is 4 and attack dice are 2 & 5; the total would be 3 (2 + 5 - 4 = 3)
My angle here is that faster initiative yields weaker attacks unless you land a lucky strike. What are your thoughts? Am I on to something here or way off base.