I agree.Note that in kile's system skill increases the roll so the results are shifted upwards.
It's a novel system but is stretching a single roll of 2d6 to its limit.
I have toyed with hit location systems in the past, but over the years I have moved towards reducing the number of rolls during combat to a minimum.
Both this and his Treatment rules are great for a rare case when hyper-detail matters.
As a general rule, I prefer a system where you don't need to look anything up. I currently use Striker's 4-8-12 progression where a damage of 4+ = light wound, 8+ = serious wound and 12+ = critical/dead precisely because I can remember it with no tables to look up.