8 months since the last post but i really like this thread.
what i would like to add is:
* possibility to overwrite your old rating
i'm really sad that i gave my current favorite map in the game a rather bad (well not that bad but not 10* either) rating. i would really like to change that now that i can play it better, appreciate it more, play it more and have more experience. i don't see anything wrong with this.
i like the idea of a 'professional' rating too but not just QAT's / BAT's. make it for qat's, bat's, mappers with at least 1 ranked or loved mapset. because there's only a handfull of qat's and bat's. many maps wouldn't have any ranking at all and some would only have 1 vote which would heavily distort the quality in my eyes
you need a bit more people to rate. maybe even add modders (people that've earned kudosu). idk.
i also like the idea of making a ranking for seperate diffs. there are just so many maps where i'd say "oh, that diff is one of my favorites, but the rest is kinda lame" or there are guest diffs i either really love or really hate. idk. stuff like that.
reset of votes: idk. sounds mostly reasonable. i see some minor problems about this but all in all i think it'd be good too.
all in all i like this suggestion and would shoot a star, i'm just not sure whether it's still worth it after this long a time