It's only on Linhof Technikas and cameras that use their lensboards that the board is off center in the neutral position. I think it's just a function of how they have been constructed, historically or perhaps to make more room for the lensboard clamp on top or for the wire-frame finder that sits on the front standard on the older Technikas.

My pre-war Linhof Tech II actually does have significant front fall (but not as much as it has front rise), but not front forward tilt. If you want front fall on a newer Technika, I guess you would drop the bed, tilt the lensboard back to level, and then adjust up from there or turn the camera upside down and rotate the back.