Completely disagree. For a new game (according to the game developers I know), things like character classes (or archetypes) and the setting are the things that gets buy in by buyers and new players. For D&D, limit it to such a bland, creativeless future and I think people will just wander away as they have done before and it will lose players. There are a lot of world builders out there. Also, lots of people with favorite setting that is a published one for D&D, and they never seem to agree on which one that is.