Well first thing I want to address, is that the indicator isn't used for people to get competitive over. If you have 50 reports with 50% accuracy, that is still highly appreciated. Getting your score as high as possible isn't a huge concern. Though if you have 500 reports with 6% accuracy you are pretty much wasting moderators time, and should look at what you are doing and reconsider. That's not to say that I discourage people from reporting posts ever, but if your score is miserably low, might want to read some moderator clarifications on policies in meta.

I don't think the report accuracy feature is important enough to warrant additional features until there isn't much left to do software wise. If you have a question, send a pm to a moderator and ask. They will probably be able to give you a more thorough answer to a range of questions than you could extrapolate from accuracy %. Admins are always swamped, so my advice would be to shoot a pm off to the local moderator of the thread in question, or a global moderator. Always happy to fire off a pm to someone not trying to start some drama. Questions are a highlight of my day