My two cents is that it feels like you've had an answer to an extreme question, but that answer had more extreme questions that needed to be answered like;

- If your company were to suddenly lose all B2C revenue (without the benefit of increasing your rate of adoption), what would happen? Would your company survive? If not, what would need to be done for your company to survive with only B2B revenue? (More sales training? more enterprise features? resource cuts? or more aggressive growth to fulfill client requirements? etc)

- Compared to those things you said you've needed, how important would be the increased rate of adoption from making your B2C free of charge?

High-risk high-return problems are never easy, but I guess asking these different extreme questions lets you find some low hanging fruits to high-returns or get a plan going to make those moves less risky.