I really don't buy into the whole "it's optional so it's completely okay" defence of fast-travel.
Including something as detrimental to the open-world experience as fast-travel or markers in the game, then relying on players to choose to ignore it is bad game design. It's essentially like releasing an inferior version of the game.
A lot of people, particularly those who played Morrowind, will understand how much the experience can be enhanced without such features. They'll ignore fast-travel as much as possible and make the HUD transparent. However a lot of other people won't know this. They'll see all these hand-holding features and just assume that's how the game should be played. They've been sold a lesser experience and don't know any better.
What Bethesda SHOULD do is design the whole game without fast-travel or markers. Then, they should tuck both away as options in the game's difficulty section that need to be enabled before use, with a little disclaimer about the quality of the game being impaired. That way, the game is released in it's ideal form, but the option is still there for people who feel they need it.
...
Anyway, more to the point... I think Bethesda's stance on this kind of thing has changed simply because they can no longer afford to try and make the best possible open-world RPG for fans of open-world RPGs. They're now trying to appeal to everyone under the sun with a gaming platform, so accordingly the direction of development changes and design philosophies have to make way.
I'm not sure they'll ever admit they're compromising the quality of a game to appeal to a bigger audience though... in fact they still adamantly stick to the idea that they're making the game
they want to play. I do wonder though, what kind of TES game they'd make if they went the kickstarter approach like Obsidian instead. Something makes me think they wouldn't feel so passionately about streamlining and accessibility as key development goals for such a game.