I think this would work well with repeat clients who know exactly what they want. However, many clients' attitude is I'll know it when I see it, but I couldn't tell you what 'it' is. Your product will accelerate the 'back and forth' but won't eliminate it all together, even with the detailed proposal generator.
Obviously there are some very smart people working in government intelligence agencies, including the CIA, MI6, etc. However, in my experience working in the private intelligence sector, I found that many former government employees lacked creativity and relied too heavily on 'classified sources' and their network. The best analysts were extremely lateral thinkers who used Google and public databases, but would never have passed a government test on account of their quirks.