Being able to jump only at certain locations sound good. not sure what you ment by automaticaly though. it should be like most of the things in FFXIV. an ! icon should apear at places where you can jump up over/on/off an obstacle.
I proposed this idea back in Alpha. I suggested "Auto-Jump" as you are approaching obstacles. Someone argued that systematically it would be a pain in the ass to program those jump locations and just adding jump would be easier.

By automatically, i believe he might have meant similar to Final Fantasy 13 (as you approach).
It was sometimes annoying if you didn't want to jump though.