You know that Codemasters have the licence for the rallycross. So they will add the last tracks and cars missing in the game.
Maybe in the season 2 and i hope for that.
I like your propositions for new rally locations and new cars but stop complaining about the rallycross. Rallycross is in the game since DR1, they announced a full championship in rallycross so you can't complain about rallycross because you already knew that they will add the last tracks and cars. :)