Toggled UI is confirmed (according to UESP), children (possibly, but I can't judge on that yet), and hardcoe mode (if included), definitely.
Pretty sure quest markers have been removed in favour of clairvoyance (watch G4 trailer), which IS optional.
Otherwise, mod it. And if you can't play it on PC, then buy one capable of it.
EDIT: Typos
Looks like you want more options than needed too! Quest marker toggle? No. Compass? No. Crosshairs? Yes. Finishing moves? No. Although I agree that I don't like the idea of finishing moves, we shouldn't be able to toggle it. Mods should take care of the extra stuff that we don't like.
What is with all the PC gamers? It's like they think us console users don't even exist! Are you really so self-centered as to say that we need to mod all our problems away even though there are so many who can't mod their games?
On Topic: Only the most controversial things should be toggleable, like quest markers, finishing moves, "hard-core" mode, etc..
I would very much like quest markers and even location markers in general to be toggleable, it increases my chances of getting lost, which is actually fun. It's also more realistic, who has a compass that points out every nearby location?