I am rereading the Dune series now, currently on Book 6 (Chapterhouse Dune). I'm even going to read the son's books 7 and 8, which I skipped the last time.
None of these novels leads me to think a MMO Survival game makes any sense for Dune, but good luck, I guess.
RTS honestly makes the most sense(shout out to old school pre-C&C Dune RTS), either land based or orbital to planetary based, followed by MAYBE a FPS, at a few points in the storyline.
But the movie did really emphasize blade combat, so who knows.