As a developer (not of this particular app, however), I always welcome feedback fom users through tickets. Yes, it can be rejected as “won’t fix” or so, but at least there is a trace of it and people can know the reason for rejecting. Usally I don’t close tickets because “no one is interested”. They may stay open for a few years before actually getting implemented however.
If there is a list of improvements for this particular app, we can also consider adding them to our list of Google Code-In tasks and get our students there to work on it. But if all the ideas are just discussions lost in this forum, it is much harder to track them down for that purpose.