I think this is one of the things you're looking for:
- Q to open Character Menu(Inventory, Class, Equipment, Status)/Display Command description in battle.
So, during combat, if you want to know what a skill is going to do, hover over it and click Q. If you're using an Xbox controller, use Y while hovering for the same effect.
And I think the game is still a work in progress. I could be wrong, but if I'm not, that means content is going to be missing. The developer might intend to add secret scenes and just hasn't managed to get to it yet.