Basically all cockpits were built with one (standard) or rather two (gunsight) fixed positions in mind so all faces which aren't visible from these two spots were removed for performance reasons. It may be less of a problem in some of the newer aircraft but as a whole it would mean reworking
all cockpits to the same standard and last time I checked SoW-BoB was scheduled to be released this year, not 2020.
So no, TD won't rework all cockpits. We have a live, too, you know.