Easily solved with a rank attached to the number like a star system or a statistic like average dps for that content or something similar. It doesn't even necessarily need to be based on actual performance of other players and could just be threshold numbers that are set by SE. It doesn't even need to be ranked across the entire scale of players or have much granularity to it. E.g. a 3-star rank in a 1 to 3 star rating system might be achievable with what would be roughly a 75th percentile on fflogs.
It's not perfect to just see your number and relative rank, but it's at least informational. A full parse will always be better since it contains so much more information, but I would definitely approve of some sort of performance information being given out in-game.