A Downwards pointing Dispenser will always place directional blocks like stairs in the same direction each time, it would be better if the direction could be manipulated somehow, like having the direction depend on from which side the dispenser was activated from, like having the dispenser change the direction of the block to face left if the signal came into the dispenser from its right side and so on.

Or add different facings for a downward facing dispenser like it has when it's facing south, east, north, and east, when not pointing up or down.

The latter approach would be best, it would require a bit of a texture change for the facings to be readable but still better than not being able to change it at all.