The Score V2 Takes away a large amount of points for ANY mistakes you make, including 100s. That's stupid for anyone who misses by a little fraction of a second. I also noticed with the Auto on, the Score V2 always gets a very tiny score. On Songs where even I would get 2 million or so, it will get 200,000 or somewhere in the area.
Also, 300s can equal anywhere from 300 to 655 as far as I've seen (That's the highest and lowest I could get with it)
For 100s, it can go down to 12, the Highest I've had one is 100, but that was the first note of the song, after that, it takes points away.
For 50s, it just takes points.
Then Xs take the most points away.
Basically, if you're not perfect, your scores are going to be terrible, and if you Are perfect, your scores will still be terrible