Hello,
The first feature is an exchange. Everyone needs this, not just you. I have written about this before on the readme and elsewhere, including a long explanation here: https://www.dashed-slug.net/forums/topic/when-is-the-trading-plugin-role-out/#post-2404
As for PoS coins, they will not be implemented any time soon. There is simply not enough time for me to do this, and it is a huge architectural change that would require changes everywhere including the database tables, adapters, etc.
I try to add features that people ask me but these two things are very huge tasks. I am trying to do the first one, (the exchange) as time permits, but the priority has to fall on solving bugs and providing support.
In any case thank you very much for sharing your thoughts. I appreciate it.
kind regards
Alex