So I think that goes back to the whole CX-9 exists..... if you want more space there is a larger vehicle available. Much like Jeep has Grand Cherokee, VW has Atlas, Honda has Pilot and so on.
Problem with these vehicles is the 3rd row, which is pretty much useless unless you have lots of small children. They just need to make a CX-5 with as much cargo/legroom as the Forester or CRV, or close to it.