I 'm either the odd-man out, or the last to the party. I track melee in close detail, including crits, HP, etc. I use the "basic multipliers" for crits, kill, and bonus kill points. No multipliers for HP given or received. I also give "avoidance points," equal to 1.1x(kill+hit+bonus), to encourage non-combat resolution of confrontations.
In my newest campaign, just starting, I have added a "motivation" characteristic for each character, chosen by the player. The options are linked to specific forms of xp like travel, ideas, and kill points, except for one called "cause". The latter requires me and the player to agree on what the character's current "cause" or mission is. For every 1000 xp the player gets in their motivation area, they get an extra DP when they level up.
Since I've found keeping the detailed melee logs is useful overall, I don't consider it extra book keeping.