First dividing 2-C by 2 would still be 2-C, 50% of infinity would still be infinite as far as any math is concerned, but since this is related to DB and the feat being Whiz saying the clash between two gods will destroy 2 universes, this is a blatant 2-C feat and should have never been half 2-C from the beginning saying their power would destroy half each is wrong, he just said their energy attack clashing will destroy the two universes.
So this CRT is not needed, it should be a CRT to give them the actual tier they were supposed to be in the beginning.
And also if to clear this up, if a character is baseline 2-C, and he says I am twice as powerful as X, does X get low 2-C or 2-C?
Well according to the standard, he gets 2-C, so I really do not see how this is any different, or why 2-C can be divisible to be low 2-C, if low 2-C cannot be multiplied to be 2-C.