Although I've been following OCR for several years now, it's only after downloading this track that I went ahead and registered to make this post, so you know just how bodaciously rocking it is. You have just prevented yourself from ever being invited to open for Alanis Morrissette, because it takes everything that "Would Not Come" was going for and just jams it better -- even its instrumental b-side.
I wish to strongly influence you to take Zyko's comment to heart... it's not just me who agrees with him on this: I was playing WIP2, then I turned around and found my Mom in my room dancing to it. It's not the vox -- the rapping is tight -- indeed it gives the track a different dimension, a cooler interpretation with mass appeal. Rather, somewhere between WIP3 and WIP4 the creativity of your combined talents went unchecked and distractions from your respective day work got the better of you, IMHO. Musically something was lost of course, tis the way things are I know.
The way the instruments layer gradually in the start of WIP2/3 creates a suspenseful build-up very fitting with the overall mood of this opus... which went missing in WIP4. The complex variation on the strings you instead introduced seemed sudden / grand to digest so soon, and perhaps better placed towards the middle or end of the track. I like the punch of the final mastering on 3F.
As an instrumental piece, it is very formidable on its own, and the magnificence of the strings does risks drowning out the lyrics, which may be what is making postproduction take so long. Don't hate me for posting this now when in your mind this track was so close to completion . This is what happens when you keep a WIP open for too long, a world of cooks wants to put a finger in it. So finish it before we all take you back in time to WIP2 and keep judging it until it never sees the light of day!