We are only getting one new dungeon every odd patch starting with 4.1, cause they want to spend dev time on other content so that is perspective right there.

Of course they don't really go back and fix old content unless it's broken, or it absolutely needs it. Like the more recent exception is them going back to modify Labyrinth of the Ancients party setup so you don't need 6 tanks in the alliance for the 4.1 raid roulette. So no, changing the light party setup is just never going to happen.