I think this might work particularly well in games where you wanted a gladiatorial feel where a combatant has one armoured arm and leg, but it could also work in a campaign where characters were scavengers who needed to eke out combat with only a few scraps of armour. I also think this is probably easier for people who have trouble remembering the d20 table from Mythras to keep in their heads as well.
For the system I'm thinking of, you'd decide at some point before a fight which side of a character is "dominant" (the right side in right-handed characters), and thus is more likely to extend towards the enemy at any given point. The other side is the "trailing" side.
Then, the distribution would go:
2 - Trailing Arm
3 - Dominant Arm
4 - Head
5 - Chest
6 - Abdomen
7 - Dominant Leg
8 - Trailing Leg
2 - Trailing Arm
3 - Dominant Arm
4 - Head
5 - Chest
6 - Abdomen
7 - Dominant Leg
8 - Trailing Leg
This would make wearing a helmet and cuirass (chest and abdomen-covering) particularly valuable since about 62.5% of all hits would land on one of these three locations. This would direct most strikes to the centre line of the person. The dominant side is more at risk (25% of all hits go to it - 12.5% to the arm and the same to the leg on that side) thus motivating the next heaviest armour to be placed on it. The trailing side's limbs each only have a 6.25% of being hit, representing them being both mobile and placed furthest away from the attacker.
If anyone has experimented with this, I'd love to hear about it. Otherwise, I'm currently on hiatus from roleplaying and when I do start up again it'll be as a PC in a 5e game, so it'll probably be in 2021 at the earliest before I can test it out.