The Talented Learning Center is the world's only educational and research community centered on the learning systems marketplace.
If the buyer hasn't shared enough of the right information to help you craft a compelling, coherent, complete - and differentiating - proposal, it's your responsibility to ask for more input, but be prepared to explain why this is critical and why they should care.
While the "setup–show–recap" method requires more effort than the "spray and pray" approach, prospects should recognize that you've mapped their pain points to relevant use cases.