DPS display could easily be solved with a system already in game.

[Gilraen]

I'm not advocating a scoreboard or a party wide parser, just a personal parser so you can see yourself, and no-one else, how you are performing. Which will give players a solid reference of what they should/could be attaining to, to be able to clear content they are stuck on.

This I have no problem with. I don't think anyone here has a problem with this. But it's not what's being asked for. What is being asked for is some kind of party tally of everyone involved 'for improvement's sake'. As has also been pointed out, the potential for abuse from such a tally is too much to be permissible. We already alienate people enough with such excuses as low HP, low iL and even number of times killed in a run. We don't need to add to that with a parser.