As far as I know, there are 3 major actions that people take that harm the gaming community, and that should therefore have people who engage in them be removed:
1) Frequent slow play/disconnections.
2) Abusive language in chat.
3) Kingmaking (Deliberately having one player win when there is an obvious play available that will let the active player advance their position further.)
Situation 1 is easy to detect, and handled automatically with the karma penalties. Situations 2 and 3, however, cannot be consistently detected by code and need human investigation. Having a report of "On table xxxxx at about hh:mm, player ZZZZZ called me a #$%$, which is a slang term for female genitalia" is a much easier investigation than "I didn't like what ZZZZZ said to me at a table once." It ts also much more helpful than "On (the wrong table number), ZZZZZ ...."
OK, 4), exploiting a known bug to get a win, but that is normally better taken care of by fixing the bug, not eliminating the player.
I don't think this suggestion was wanting to increase the number of reports, just increase their accuracy and helpfulness. I can see the reason for concern for hot-headed reports, though, so I like the other suggestions of having assistance in filling out the forms.