This works only for a specific genre of music. There are tons of moments in rock songs where an "intro stream" can work wonders that would come over nothing before the moment you are trying to define.
Overmapping can't be defined by rules. Sadly subjectivity plays a major role here, however what is always true is that the rhythms should be preserved when overmapping does happen. If you have a distinct rhythm such as 3 notes which are 3/4 between each other then it's pretty stupid and pointless to map a stream between the first and the last note. With your rule this would be allowed and it wouldn't make a difference towards the better.
Also this rule would still allow the really disgusting extended sliders which intentionally go past the required rhythm point just to justify "cool rhythms" or "it follows the vocals".
TBH instead of a rule just have a recommendation that mappers shouldn't map notes which are not in the music. Anything more than that will cause endless debates (as you are already familiar with) and will still allow double standards when it comes to certain people.
I personally don't like where this is going at all because I know that some people intentionally do this because they think it's cool, same goes with doubling bpm just for the sake of it.
Overmapping can't be defined by rules. Sadly subjectivity plays a major role here, however what is always true is that the rhythms should be preserved when overmapping does happen. If you have a distinct rhythm such as 3 notes which are 3/4 between each other then it's pretty stupid and pointless to map a stream between the first and the last note. With your rule this would be allowed and it wouldn't make a difference towards the better.
Also this rule would still allow the really disgusting extended sliders which intentionally go past the required rhythm point just to justify "cool rhythms" or "it follows the vocals".
TBH instead of a rule just have a recommendation that mappers shouldn't map notes which are not in the music. Anything more than that will cause endless debates (as you are already familiar with) and will still allow double standards when it comes to certain people.
I personally don't like where this is going at all because I know that some people intentionally do this because they think it's cool, same goes with doubling bpm just for the sake of it.