That is **** poor if true A conquest type mode is super basic and should be a bare minimum to be honest. I really hate the heavy online bias in games now.
If the website splash is anything to go by offline play you have the options of survival mode, large scale battle set pieces as per the movie ones (but more like team dm than objective) and hero set pieces.
http://starwars.ea.com/starwars/battlefront/features/missions