Hey, still haven't received a new ac adapter for my old laptop so I was on my phone but I'm back right now on a different computer, i'll answer questions
Hanyuu: it is I was actually highest pass level 5 around a month ago, but I figured eventually something would catch on or I'd get more in tune with the songs since I had the speed but not enough accuracy. One of the problems noticed I had while playing is sometimes I would misread or interpret patterns by the sound that aren't actually there or not accurate enough, then when playing a peak wall of the song not able to pass it consistently because I would start trying to rely on memory ("memory-crutching" as i'd started thinking of it as).
So instead of reading soley on the patterns I started noticing more of the spacings generated in between the notes and letting the randomness of each line of the chart flow through. Then if I start to fail a piece or feel like I'm starting to "memory crutch" parts of the song to where I lose too much accuracy, I'd just try out a different song and start a fresh reading. Also adjusting speeds a little between runs sometimes can help. I'd been playing a bunch of the autoconverts and mania mode only charts this year, but notewalling I think I'd only try out around 5-8 songs each session at most, and recently started switching between songs and trying out different levels like I just mentioned, also going back to improve scores.
And yeah, I've noticed that level 10+ is a lot like taking a level 1-5 chart and just adding a bit more complexity (maybe a stream layer on top of the chord pattern that would have been there if it was level 1-5). Unfortunately, I still can't seem to make it over the wall around level 13-14 :/
I agree, I was in the same place recently, i'd say like I was explaining before keep switching through songs at different levels and see which one's fit your hands best, and since the scale is more even who knows what you could pass. Also not thinking about the level which song is can help
More on accurate reading, I also tried out some of the higher level O2jam charts from Bobbias's conversion thread and earlier during summer developed a new skin to make the LN notewall charts more passable, also my friend Zach came up with the brilliant idea of making a transparent judgement system.
A few main ideas went into the skin for an alternate reading format. First idea was separating the false information given while playing from input or reducing distracting elements on the board for a cleaner reading format. Borrowing an idea from LongGone I created a version with no note lane lighting, with the final version having thin parts of the lane's lighting animation (from the beatmania skin given here) being placed into a new combo animation to be used as dim note tracers/pulses, so the only hit animations being generated on the field are related to the actual notes being played on the board.
Another main part is the transparent judgement system, which is another thing I've grown to really like but it's really whatever you're comfortable with. Zach thought the default hit lighting and combo animations were too bright for his taste, so to make it more like the game we played (Feel The Beats) I borrowed and edited a new judgement font set where the 300R-300 frames and displayed as a transparent "Flawless" and "Perfect", while when your accuracy wavers to 200 and below it becomes an opaque green "Good", red "Bad", 50, etc. What this is does is actually gives you more reading space or spacing between the notes as you play in time and also without lighting on the lanes a clearer general pattern as you play.
And the longnotes which aren't really needed much for here but had taken more interest in recently and developed a new style for the more advanced charts is the idea of a blue and white skin with longnotes that are weighted by length (A solid color section of the note that is stretched by length) and also hit-activated so it takes an o2jam esque bar form initially and turns into a thin beam with a release indicator when you are hitting the longnotes, so you have more of an input response when playing a chart with many longnotes spread out at the same time, or the short but fast groups of long notes that you can now actually see more of which ones are being hit so the chart is easier to follow.
My laptop is down at the moment so can't take screens, but luckily I had linked to it on the 2nd page of this thread earlier during the week, a lot of interesting things added, you should try it ^^.
Other things
Also this summer I had modded my keyboard with a special tape, my keyboard is loose or light I noticed with less resistance which is good for speed, but also becomes slippery, so I experimented with creating square tape pads over the keys, in the first combination I had only used thicker pads on the LH index finger and RH middle finger to better hold the hands in center position and the latest I tried I created triple layer square tape pads for the two centering fingers and thin single layer pads for the rest of the buttons besides the spacebar. Strange but it worked well with me for keeping everything in place and the technique flowing
That's about it for now, hope the advice helped you! I'll send the overjoy 7 converts I made to Doorknob next week when I have my laptop working again and I also transferred over the BGAs, have a good weekend
Freedom Dive All Key video:
http://www.youtube.com/watch?v=6FO3-PuHorgIkusauta:
http://www.youtube.com/watch?v=crMBgCOXZfY