Jedi : Fallen Order survival mode?

I love the combat in this game. I flew through the story, but can't help but still want to slay some lesser-than foes. Even on Grand Master, the lack of an objective makes it hard to engage in fluent combat sequences. Just as we battled in the hands of the Haxion Brood on Ordo Eris, there should be a type of survival mode for players that can't get enough of the beautiful combat this game exercises. Please, I would enjoy this greatly!!! Of course if you could make if make sense, and not be cheezy all the better. But nonetheless I would love to slay some foes endlessly until I am slain myself... May the force be with you. 😄😊 

P.S. the Batman Arkham games come to mind O.o