Currently when I create a Reference Grid (Graticule & Measured Grid), and set the top and bottom axis labels to vertical, the labels end up facing in different directions.
Apparently this is hard-coded and the only way around it is to convert the grid to graphics, ungroup and edit the result. This is not a viable solution when producing many maps, using Data Driven Pages for example.
There should be an option to define the rotation of the labels.
I'd also like to see better control of reference grids in general, and this idea could be combined with others as part of a wider re-vamp of reference grid controls.