No, I don't reheat them from frozen, they get taken out of the freezer the night before and left to thaw out. When I reheat, I always preheat the oven to about 180º C and the pie only needs about 15-20 minutes tops.
My missus cooks things like shop bought pizza from frozen and even though I have a perforated non stick pizza cooking tray they invariably end up with a soggy base... yuk. Also, I am reluctant to reheat anything with pastry in the micro zapper, again it makes the pastry limp and soft.
Another good tip for a properly cooked base on pies, pizzas, quiches is to cook in the lower