I'm going to call this a tileset error because it's clearly a set of tiles that would make map building a hell of a lot more versatile than it is.
Attached are three south-to-north-upward cliff access designs, one relatively recent.
Also attached are three north-to-south-downward cliff access designs, all obviously lacking.
And there's also another issue that's kind of only covered on a north-to-south cliff access design here, which is being able to do this for multiple layers of cliffs simultaneously.
So basically my suggestion would be.
1. Add tiles to the tileset so that you can transition 2+ levels of cliffs seamlessly for both north-to-south and south-to-north cliff access designs. It's also advisable to do this for east/west cliff access designs. It would have the nice side-effect of making it a lot easier to fix cliff tile errors when there are those levels of cliff that come out of nowhere, e.g. the one that comes out from between the Graal City Church and Onnet Town. Also, Onnet Town in general.