EDIT: Maybe the end of the animation could be altered to show that the Death Star internally has a multiple reactors, set up like spikes on a wheel, and instead of the proton torpedo going to the “center axle”, the center of the Death Star, it can go to one of the spokes where the explosion animation can happen. This isn’t necessary but it could be one option to help differentiate the ANH attack to the ROTJ attack.
I’m liking this idea a lot.