Two things, BT definitely had a hand in writing the regs, because they had a hand in writing the original regs(for cigarettes) that these regs are based on. They also likely had influencing meetings on this draft, though I'm sure they didn't get everything they wanted either. Their closed system products are the most likely to get approved, but there is no guarantee they will be. Vuse may have to lose a few of their new flavors.
Also, I keep seeing comments that the FDA is asking for more than they expect to get. Where is this idea coming from? They're done asking, these aren't another rough draft that has to get approval. The approvals have been received, these are the FINAL deeming regs. Yes, they could be changed by Congressional action, or a lawsuit may bring some things into question, but this is past the negotiating point if there ever was one.
IMO I don't see much point in fighting the regs on the grounds of how onerous they are. They are essentially identical to the cigarette regs, and the tobacco industry survived. The only point of contention that we have is that vapor products do not pose the same public health risks, the FDA admits they don't have sufficient data to prove risk, and therefore should not be subject to the same kind of regulation.