No, Lake (and the composers mainly) aren't back to square one, most of the zones music may not be finished but from what I can tell almost each zone is only 1 act and a boss, (plus 30 second cutscenes) from being done, if they put everything into these next two months there's a chance they can do it.
Hi Lake btw, it's Aizen9 from youtube, thought I'd sign up here so I could talk about the ATS soundtrack (and fan games/hacks in general obviously) here rather than do it awkwardly on youtube, plus I've been a lurker of this forum for a while so I thought, hey why not.
I said the same thing to Falk yesterday, but if things come to the worst and some composers are too busy to get their tracks done in time, then you could ask the other composers who either have free time or are done with their tracks and don't have anything else to do, to compose the tracks for them, just things like that to get the soundtrack finished.
I don't think it would be selfish at all at this point to email the composers and ask for them to do that and knuckle down with getting the tracks done if they have the free time to do it, it's been three months since you wanted them finished I think you're in your right to be a bit more assertive about it.