Thanks for the feedback, super helpful -- it's exactly the reason why we wanted to roll out in a private beta.

The short of it is that we're sacrificing a lot of this to save simplicity right off the bat. Frankly, it's the main competitive advantage to all of the many other tools out there, we believe. That said, there are a few of your requests that we're actively working on.

In particular, points 2 (add/edit progress bar), 2 (we're working on file attachements now), and 3.

Stuff like multi-user accounts and deal checkboxes are unlikely. We are looking to add reminders, however.

Again, thanks for the awesome feedback.