Thank you very much for such deep and detailed feedback!
Finally, we now have chests in the engine. You can choose exactly which item to place inside a chest, or you can enable an option that makes the chest give a random item to the player.
Chests are a staple of almost every RPG, and they were definitely something the engine was missing until now. I'm very happy to finally have them implemented. Feel free to check them out if you'd like!
I'll continue investigating the other points and ideas you've raised. Thanks again for all the valuable feedback.