What I would really like to see in a future update of logs.tf is 'Net Damage Output' which be total damage divided by damage taken.
Whilst most people automatically sort by damage given first, people often don't like at damage taken. For example if your pocket solider is putting out 390DPM but is taking 420DPM then his/her net damage output is -30DPM and therefore indicates that he/she is not helping contribute to his/her team as much as he/she could and soaking heals away from the rest of the team. I feel that net damage output is an important statistic to consider that most people don't necessarily look at. An individual like Gentleman Jon could have a field day with this.
People can quickly calculate this in their heads of course, but that also means the coding for this should be relatively simple and would encourage people taking this statistic into consideration, which in my opinion is quite important.
Disclaimer, i'm also well aware logs don't always accurately reflect in game performances.
TLDR: New statistic 'Net Damage Output' which could divide total damage by total damage taken (as well as per minute ) encouraging people looking at this IMO important statistic.