I don't like there to be too much contrast between open world and dungeons, for dungeons to be linear platformer labyrinths. Rather there should be realistic buildings/living spaces that can be extensive (factory/hospital/castle) but are still relatively quick to navigate around.
There should also be balance in the open world area. It's a matter of taste should there be one central hub from which you get everywhere practically or a circular structure of three or more smaller centers.
Too often you have relatively small area (of connected places) where is also most of the interesting stuff and majority of the world is fringes where there are only places you have to visit for one mission or minimal generic buildings/dungeons you don't have real reason to visit.







