Hi atiuzlet,
You have some greats ideas .
[Idea 0] We're working on that, not sure how will finally implement that, but we're working on it.
[Idea 1] Not sure what you mean here, I think you can hide empty categories at theme level, modifying the theme
[Idea 2] Yeah, you will be able to add any custom fields as you want. One of the main features of next version (2.2) is to be able to customize your ads and add new fields such as phone, or any other data
[Idea 3] Great idea, we didn't think about that before, we'll study the idea, but it sounds great
[Idea 4] We thought about it before, we'll release it as a plugin, but we're not currently working on that, so I can not tell you when it could be done
[Idea 5] Same as Idea #4
Thanks for the feedback and the suggestions, you helpedus a lot!