I thought it was the same issue too, but apparently not.
I was orbiting at 5000ft in my A-10C and my squaddie tested the new GC features.
Suddenly he told me to look down below me and I saw some huge explosions, without any FPS drops at all. I think he used 3-4 MLRS system at once. It covered roughly the same area as an 87. I can't really say if the explosions was new, perhaps a little bit brighter.
I was preparing for the usual 10 FPS decrease we had in 1.2.2 but it didn't happen.