Damn beautiful for something that ain't finished
First off, the vocals are great. I wouldn't change much in their presentation, if anything at all.
Second observation I've got here is that it feels like I just listened to three different great songs here. This thing is seriously operatic in scale and I love it. I don't think it's as innovative as Electric Pulse was, though I think what you're trying to do here is break into a more theatrical type of storytelling / experience-conveying sort of industrial rock (Perfect Drug comes to mind, thinking of something to which I could compare this)
There's just something missing here and I can't quite put my finger on it. Seems like there's no backbone holding together the song especially after three or four minutes. Every segment has its merits, especially the seventy seconds after 2:00 (and it's just awesome how you led into and through all that); I just don't see all the pieces fitting together all that well at this point. I don't know if you need something solid below and between certain parts to bind them together, or even something as simple as standardizing one of your synths and giving it more of a constant presence. Maybe a couple of your transitions could use some touchup - the one at 3:10 was a little distracting for example.
There's a hell of a lot of potential here, but like you said it's a work in progress. I can't wait to see where you take this.