Ooh I've never messed with the 3D Elevation, I'll have to check it out!  It's good to know you've been out there, my fear was you were some person in who knows where just doing everything on satellite and vibes haha

Specifically what caught my attention is the east entrance to La Tuna Canyon Park, which I had mapped with GPS and then was adjusted in this changeset, but after reading your message I put the GPS track back over it and I think the changes totally work and are an improvement!

While I was in Achavi tracking the changeset, though, I did notice the changes to the northwest end of La Tuna Canyon Trail - and the new path for the switchbacks there don't line up with any imagery I can find.  I didn't adjust that trail after I hiked it (might have been before I was an OSM editor??) so I never uploaded my GPS track, but I can probably find it and upload if you'd like me to verify before adjusting it back