I think by "No Stylus" he means "with stylus". If stylus equates to tablet, I don't see it as an issue. With the invention of Ctrl/Z/Spacebar tapping, notes that are close together are a breeze, at least for me. Anyhow,
"as well as the number of hitobjects per playtime-second" (Too lazy to copy-pasta and quote)
This sounds like it's taking an overall average, and not factoring in specific densities. I could have a 6 minute song with, for the most part, 1 beat every two seconds, and then in one section just slam down four beats a second for a while, and the program would (presumably) report a rather low hitobjects per playtime-second. I know it would be a bitch to try and automatically dissect the songs for particularly dense sections, and then try and rate each of them specifically, favouring the more difficult parts, but wouldn't it be so much easier if the community decided a ranking on a per-submission basis? =D?
At least for now?
I'm actually impartial - just trying to lighten the load a bit.