I liken the idea of alpha readers to the popular tech concept of failing fast. Why not fail early in front of a smaller audience (with a chance to pivot and improve) than wait to fail late and run out of runway (or motivation).

In my case, I thought I had told a different story than the alphas perceived, so, in truth, I hadn't told the story I set out to. Making changes was a natural part of the process to correct issues "lost in translation" as it were.

PS: rooftop conversations sound awesome, by the way.