I checked as well. It's definitely true that the modified Cranim.txt affects the structure. The battle map became permanent. :)
However, I tested one battle with an external Cranim.txt and without it, and I didn't see any difference.
1 Rusty Dragon attacked 5 Mighty Gorgons, and it received Battle Damage (BD), and then attacked them again. BD appeared both with and without Cranim.txt. Therefore, I conclude that the animation accelerator does not affect the game's structure.
However, with the modified accelerator, not only does the Rusty Dragon not experience a morale drop, but the Gorgons also overwhelm the dragon with their deadly gaze in response. :smile40:

That's the situation...