This video made me believe, that it is better to reduce gravity in rooms with low BPM limit. The player had hardly enough time to drop the piece on a not too bad spot.
kinda agree, i had some friends joining c2 and when I gave them some tips and watched them play they barely could get the piece in the right spot before it gravity dropped.
Downside is that they will get used to a low gravity and when they go in other rooms the game gets harder again
looks like they were trolling and missing lines on purpose.