pies with bottom pastry (if you will pardon the phrase) will always be soggy if baked in a pyrex container. Pastry should always be baked in a metal container as the metal gets and holds the heat much better......there speaks the voice of experience....lol
I agree with IDonNo. If you bake in pyrex you are cooking the bottom by heat conduction through the filling not the pie dish. If you have to use pyrex you will need to pre-cook the base. Probably you will need to experiment to get the optimum pre-cook time.
Better to use metal as suggested.