Fixed.
Therein lies the difference.
Those opposing playing both at once feel that the lack of balance in the back row and the impact on other facets of play eg the lineout outweighs the benefit of having both on the field.
You obviously feel differently.
I can see logic behind both arguments.
We'll know soon enough as they'll both get selected again.
I agree there needs to be balance, but those two are better "6s" & "8s" than anyone we have at the moment as well being great "7s". I look forward to the time when that isn't correct, but at the moment they are the best units.