mouseferatu said:In other words, adding Keen and Improved Crit doesn't double the range; it adds 1. (Which is the same thing for weapons that only crit on a 20, I know, but I think it'll work.)
The problem is, this is unbalanced in favor of the high-multiplier low-threat range weapons. Adding 1 to the threat range of a x3 or x4 weapon is a much greater benefit than adding 1 to the threat range of a x2 weapon.