[Reshiram]

I'm gonna respectfully disagree with you. There aren't really any spots in Since 1983 that slip into the uncomfortable position, whereas in Trisection V2 there are a lot of oddly-patterned 24ths and annoying splittable patterns in the jumpstream. And that doesn't even get into the 16th jumpjacks, which are killer to combos, AAAs, and rhythm if hit even slightly off. Plus, Since 1983 has more consistent speed, so there's less of an adjustment on the player's part to keep things steady.

Using comparisons of current songs, by objective opinion it seems to be even easier than Spoils, which is a 73.
It's definitely tougher than Faint Breath, which is a 71.

I'd actually compare it to the second half of Staring at My Spaceship, Famicom Selecta or possibly Cinnamon Roll at times. So, I'd stick it at high 72/low 73.