Here's the thing: I actually have been doing some moderate adjustments to the levels, but the bulk of this has been finished. If it weren't for the fact that I wanted to wait for Charybdizs's music to be done, I'd release it today. But since I have a long wait, I felt I might as well devote some time to tiny things that under normal circumstances any designer would overlook. It makes the levels a bit more polished, for one thing. And, even more importantly, by combing and scrutinizing the levels as I am, I do run into things here and there that I decide to legitimately improve. Admittedly there isn't much in the manner of new paths, but there are plenty of differences to the old paths. In fact, there are thousands of small differences and dozens of moderate differences, and these add up. Texture alignment in particular isn't just about the textures, for example--it encourages me to comb every inch of my levels. It means that I find glitches that I would have otherwise overlooked.
My hope is to create a meticulously polished and clean baseline upon which I can build new things and correct old things. I hope to seriously tackle bigger problems in v10.0. But even so, expect pleasant surprises from v9.0. Don't think I've forgotten about the bigger issues; I'm just trying to boil things down so that it will be easier to address them later on.
And the new music lives up to expectations as always. Well done. But for some strange reason, one of your songs on SoundCloud doesn't seem to be part of the Tortured Planet set, at least as far as the website is concerned. It says 4 tracks when there are 5.