[Not sure which forum this belongs in; please move if appropriate.]
I thought I would submit for discussion a question I've been wondering about, which is how strictly do composers (I mean of course those who write for actual performers rather than for computers) expect performers to follow the score as written?
I suspect the answer is that different composers have different expectations about this. I myself am pretty flexible about it. I consider the performance of any composition of mine to be a collaboration between myself, the performer and the audience, so I welcome the performer's contribution to the work. The only thing I'd firmly expect is that the basics -- the actual melodic line of notes and the chords -- remain the same. I consider my notation of dynamics, expressive marks, tempo and tempo variations as suggestions rather than strict requirements. In vocal works, I wouldn't even mind if the performers transposed the key to one more suitable for the singer.
I think at least some people in this forum would be interested in a discussion of this issue, by both composers and performers.