Criticism is healthy, if it is constructive.
Means: How can we do it better? (And do it in a way which is actually doable... we don't have 20 hired programmers, and all our programmers work in their free time because it's fun to write code, so, if you have some ideas which need some more work, it would be nice if you had some ideas where to get additional developers from).
And besides that: Phex can't simply go "back to the drawing board". It is in already active developement for years, and changing the basic layout of the app is quite some task.
And if it interests you what's planned for the next few months, just have a look at the
Development Roadmap.