Her first and fourth I disagree with but can sort of understand; but Lunatic Subterranean Sun easier than Normal? Really? I can't see any reason at all why this would be the case; it's both much slower and much less dense. 
It's the same with many cards on Lunatic, as long as the bullets come down, and not side ways or any other bullshit, if it comes down faster without it being too random, it's easy.
The problem with Nuclear Fusion (1st Card Normal) is the blue bullets moves waaay too slow, and the sun bullets are less frequent, so naturally, you could winded right under the one of the sun bullets since you are too busy reading the blue ones.
On Uncontainable Nuclear Reaction (Lunatic), the sun bullets are launched one after another, so it sort of creates a zone for your eyes, so it's like "Let's not go there." The blue bullets are still dense, but moving fast enough so it is not a chore to read them. At least, that's how I see it.
Hell's Artificial Sun vs. Subbterrean Sun, same idea with the fast bullet problem, what you need to do in both cards is to let the gravity take you through the gaps and regroup. In normal, you can tense up since you can move away from your gap. On Lunatic, this is less of a problem.
PS: This reminds me of Ouendan, in Normal mode there, there are beats that are not 1/16th notes intense, and that becomes harder when you turn on hidden mode.
