Don't know what to say but most players struggling with their DPS/HPS/whatever are almost ever ignoring some or all of their job mechanics. Tell these people to use their whole toolset would be way better then any parser out now.
You can't use a parser without knowing of how the parameters are working and what they are saying and the poeple i mentioned before don't seem like they could do that they get just more confused cause they don't know how to read it.
Playing by 80-90% effectiveness should be way enough for a casual player.

I would like to see a scoreboard at the end of a duty with personal rankings in the most important parameters of a class/job instead of a parser or a blunt DPS-meter.

Just my thoughts.