Race as class! Gold for exp! Craft and Profession skills! Marking! Short rests!In addition, D&D at various points has tried to steer everyone to play a very specific way, the way it was "supposed to be played". IMHO it's always been a mistake. I think one of the strengths of D&D is that people have always had the option to make the game what they want. If the developers think PCs should be able to hide quite often, there should be a section in the DMG talking about it and telling the DM what the intent of the designers is and the logic behind it. Then the DM can look at that advice and learn from it instead of trying to force it on them because that never works.