Would it be possible to make an openish world for this game, similar to diablo 2?

I just think this game would be amazing if it combined its gameplay with an openish world similar to diablo. I don’t expect this to ever be implemented, I just want to throw this idea out there. Who knows, maybe there is an inexpensive way to do this, or maybe the modding community could make this happen.

Um… that game already exists. 40K Inquisitor: Martyr/Prophecy

So inquisitor has the combat system implemented in the tide series?