I'd think the opposite woudl make more sense. After all the higher on the neck you go the closer togehter the notes are, so a tiny amount of difference is more out of intonation. I spend more time on the sub-12th fret zone, and never ahd a problem keeping those in tune anyway. But when you are playing high and fast, it would be nice to have them frets.
the point would be to use those frets for a different sound since i dont use them otherwise. big warm sounding fretless on the same bass as sharp fretted sounds.