As some or most people know, level 6-5 is technically beatable as Small Mario, with a P speed side clip into a pipe.
However since this is such a hard trick to do, it is excluded from 97%, and that's fine with me since imo it would be unreasonable to force players to get this side pipe clip in a run. Since the level can't be beaten in a "Developer Intended way" as small mario, I think 6-5 clip shouldn't be forced. It would kill the fun of the category as a whole.
I think Rule 2 in category rules needs to be re-written, since 6-5 can be beaten as small, in theory. My suggestion is something like "6-5 can be beaten as small mario, but due to not being able to beat the level in a Developer intended way as small mario, it is not required for this category"
Then I guess Rule 5 would have to be edited as well to include the term "Developer intended way"
Another thing we can do is add a 98% Small Mario category, to allow players to choose whether or not they want to do the small mario side pipe 6-5 clip in a run. One last thing - I think it would be a good idea to allow players to take a death if they accidentally power-up to Big Mario (Or if they maybe equip a P Wing or something). Forcing a death to allow the run to continue sounds fair to me, since you do take a decent time loss when you take a death in a run