others talked about not being aware that you can pick up items and move them around (a feature that's been in since Morrowind if I remember correctly).
Not sure what you mean with picking up and moving items around, Morrowind didn't have physics and you could only pick up/drop items, you couldn't carry them around like you can in Oblivion and Skyrim.
Nice though, I didn't know you can rotate stuff in loading screen.
You don't need to sheath your bow to un-knock an arrow, just tap the X button, or it's equivalent on other platforms.
On the PC if you sheath your bow while you have an arror pulled in it it won't sheath the bow, juts put the arrow back into quiver.

Same goes with magic, if you charge up the spell and try to "sheath" your hands it will only discharge the spell, leaving the hands up.
I tried this and it didn't work.

It does, it's just that some veins have too much rocks and wooden beams close and are kinda hard to hit. You'll get updated in the upper left corner that you're getting stuff.