They rarely do actually additions, though. Villains land is one of the few to happen in Florida. DCA has the two Avengers attractions which are an actual expansion, followed by Coco.
And there are a lot of levels. Monsters to the Rescue being turned into Avatar at DCA is one ride for another, but to say its a 1:1 replacement isn't accurate. Capacity will almost certainly be higher on the new attraction, not to mention any other things added (food, shops).
The new Villains show is replacing another show, so thats 1:1.
TSI and RoA is tricky, because obviously the two Cars attractions are going to be more visited by guests than the soon to be closed attractions, but there is certainly a factor that those two attractions have a lot of intangibles that straight up numbers can't give you.