I don’t think this is remotely comparable.
Tower of Terror is an icon and a fan favourite, easily in the top 5 of all disney fans.
Mission Space was made 15 years ago before every ride needed an IP and restaurants don’t need to have an IP, just a gimmick and even then, it’s Epcot, it’s filled to the brim with restaurants.
If ROTR brings the expected crowds, DHS can’t afford any downtime for one of its biggest attractions.