That's definitely a possibility. It could be something as simple as dividing a skill into Unfamiliar (-1 to rolls using the weapon), Average (+0 to rolls using the weapon) and Skilled (+1 to skills using the weapon). Depending on how the Perks mechanic comes along, it might be possible to just add "Choose a weapon proficiency" as a perk. I'm just spitballin' here, no idea if that's gonna work.

As for point allocation, I just checked the AW playbook. When you choose your character class, you get a pick of different sets of stats (like [i]Cool+1 Hard-1 Hot+2 Sharp+1 Weird=0[/i] or [i]Cool-1 Hard=0 Hot+2 Sharp+2 Weird-1[/i], usually favoring one or two stats that appear often in that class's moves. Looks to me like it's a net of +3 to your stats, so to simplify things, you could just let everybody assign their own stats as long as it doesn't add up to more than +3.