I'm looking at No Major Glitches as an additional category, my current thoughts on rules would be as follows:

1: No skipping story quests with early spark key
2: No Battery-carry glitch

Does anyone see anything else that should be included as a major glitch? I'll be considering input both from here and the discord.

Drown cancelling i'd consider a major glitch.

Do we see any ways for drown cancelling to add value anywhere in a run if both the breath mask and underwater charge are required by category rules?

Like, it's pretty hugely unintended, but the only thing it does is allow an early spark key to skip underwater charge and breath mask.

Ok, so after double checking the Underground Lake quest, the rules would need to explicitly require Whip, Breath Mask, and Underwater Charge to prevent Early Key or Drown Cancelling from having major impacts on routing.

So, improved proposal:
All normal game rules apply.
All story quests must be completed.
All three weapons must be obtained.
Breath Mask and Underwater Charge must be obtained.
No use of Battery grab glitch.

"All Story quests must be completed"
"Breath Mask and Underwater Charge must be obtained"
Those are an excellent way to put it for NMG. Having to do both those leaves the freedom on how to skip the water snek. Nicely done.

I've had this up for a couple weeks now, unless we get further feedback within the next few days, I'll add the category NMG with the following rules.

All normal game rules apply.
All story quests must be completed.
All three weapons must be obtained.
Breath Mask and Underwater Charge must be obtained.
No use of Battery grab glitch.