I'm super glad you also liked this game (^v^)/ I'm especially happy that you like the world-building, cuz this game is part of a story that's dear to me^^ W. is also one of my all-time favs, so... Good taste UvU
The OM-battle system is actually called TP-battle system and I think there are some games out there that use it! (But I couldn't name one rn)
And I totally agree on the normal end! I always end up thinking that way when I play RPGM-Games, where the protag is stuck in a house or sth... So I included that ending in my game x'D (Also I'd def just run away if I was her)