Could the same overload as you've been saying happen with other classes? If so what do you think that could be for classes such as breath and blood or heart and mind?

Other Aspects could have sort of Limit Breaks for their powers like the Hope-y Jollybrightness, yes. Void is obvious. Life may be something similar to the Trickster Mode, or at least the effects it has on Jane that makes her able to like. Reflourish half of her planet with one jump. You could argue John’s use of the Windy Thing coming from him to extinguish LOWAS was a similar state. Blood may be something akin to the Red Miles. Mind may be a bit more abstract for that kind of thing… We don’t have much of an example regarding the other Classes’ more flashy Aspectxplosions.