... CTV & CTV2 not being allowed to serve the same area ...
They can serve
the same "area", but can't be domiciled in the same city. Another example CKCO Kitchener and CFPL London both serve most of Southwestern Ontario.
Orbot is correct that this "officially" has nothing to do with Toronto, but for all practical purposes, it does improve CTV Two availability for some in the 416.
CKVR was never at risk of losing cable carriage/simsub rights in the 416 (and the northern 905) as it is "officially" served from the Barrie tower (the fact that many in the 416/northern 905 have no hope of getting the signal from Barrie is irrelevant to the regulation unfortunately).