If I were to rate it, for me, it would be an 8 ...maybe not quite 8.5... but on the tougher side of 8 than previously rated 8s; it's more difficult than a casual song, by a substantial margin - but not insanely difficult - and it's not like it's a 3 min song - it's 7 minutes! The combination of dexterity/coordination and a higher demand of stamina than normal is what gets me. But also, I'm in the 8th week of recovery from a grade 3 bicep tear with wrist tendonitis, so maybe my perspective is still skewed
But, I digress... I know I'm not competing at the same level; that's just my non-masterclass perspective