Tyrant%? William%? What the hell are these
Knife only is already a category
NG+ is pointless for RE2 imo because the rocket launcher takes up 2 inventory slots. It's also barely faster.
NG+ is a meme. Especially so when the majority of the NG+ times don't even break the top NG time.
More categories being introduced is simply gonna make an absense of optimization.
It's low% because in B scenarios you have to kill Mr.X (Super tyrant) with the rocket launcher. You can't kill him with knife.
There's really no need for more categories to be added for this game, but you can still run NG+ and see what time you can get without needing to submit it to the boards. RE already kinda suffers on these boards with the amount of categories/scenarios each game has.
The other categories exist, because there are some people who actually play them and they're apart of the main game. Only reason why they're not as active is due to the learning curve and difficulty compared to the A scenarios.