Hi Lex,
Thanks for your feedback!
We're currently very busy with wrapping up all the new features for Mendix 4.0, but after that we are definitely going to spend time on improving the App Store and any feedback is welcome.
Be aware that you can always use the Feedback button on the App Store for any and all feedback. This will be send to our App Store project on Sprintr and will keep you informed of any comments on it and the status of the feedback.