Not sure I understand what exactly is novel about your approach. It sounds like your opening pitch was for solving problems that your visitors didn't have. That's an age old problem. You fixed that. Then, once you got a bit more of their attention, you started to elaborate on the product. This too is not much of a novelty. That's good old gradual on-boarding, "gentle introductions" and what have you.
I think an added benefit is that it makes it trivial to see what are indeed the benefits of the tool : it's what you expect from an email client plus those things, nicely presented together. Just by reading the article and seeing the screenshot, I could evaluate if I was interested in this tool, which is a very rare thing.