If you have the attention of people now, let them play with the Alpha version now so you can learn truth fast about how others perceive the problem, and your hypothesis that your app has the ability to solve it.

Also, don't sweat all of the negative posts. It is way too easy to pick holes in the work of others, especially at an early stage.

Do however look for the common themes commenters dislike, as your next code/design/pr effort can address these.