Via pre game editor, the possibility to set the stadium also without knowledge of some data (e.g. setting anyway if grass, sythetic and so on). Often during a research it's not possible to have all data, sometimes only a picure can be found. At least, a certain degree of accuracy could be achieved.
E.g. scouting Algeria I met a lot of UNKNOWN stadia but surely with artificial turf. At least we could play the game with artificial turf.