As a bunch of people have stated, the current guideline already does allow for stretching, and making the main line itself more lenient wouldn't really be the best. Instead, I would suggest just a minor amendment just to the subtext:
Using rest moments less frequently is acceptable if either the pace of the music makes rest moments counter-intuitive or if the continuously mapped part is overall more forgiving to the player.
Using consecutive shorter rest moments or less frequent rest moments are acceptable if either the pace of the music makes rest moments counter-intuitive or if the continuously mapped part is overall more forgiving to the player.
Not particularly happy with the wording, but the general intention is just to add a bit more clarification to this vague part. Someone else can probably come up with something better, but I just wanted to get my opinion in that the main guideline itself is fine, it's just really unclear what's acceptable or not. "Less frequent rest moments" doesn't really translate to "multiple consecutive smaller gaps".
Using rest moments less frequently is acceptable if either the pace of the music makes rest moments counter-intuitive or if the continuously mapped part is overall more forgiving to the player.
Using consecutive shorter rest moments or less frequent rest moments are acceptable if either the pace of the music makes rest moments counter-intuitive or if the continuously mapped part is overall more forgiving to the player.
Not particularly happy with the wording, but the general intention is just to add a bit more clarification to this vague part. Someone else can probably come up with something better, but I just wanted to get my opinion in that the main guideline itself is fine, it's just really unclear what's acceptable or not. "Less frequent rest moments" doesn't really translate to "multiple consecutive smaller gaps".