I did the vanilla sequence as you described. It took me a while to get the first one since I kept exploring the wrong routes.
To your questions about how obvious multiple routes should be; I think the longer a MV is, the more alternatives it should offer, so it's fine to be linear near the beginning, especially when you're teaching the player how to use the core mechanics.
For obviousness,, I'm not sure. If they're looking for it, they'll find it, and if not, it doesn't matter either way.
I'm not much of a min-maxer or a speed runner, so I don't have opinions on sequence breaking.
It might be a while before I upload the footage. The file size ended up being a bit unwieldy.
EDIT: Maybe not. I recaptured it at a smaller size. Here ya go - SMVM22 - Goat's Gorge Pt1 Wall Jump