To those saying S&B vs S&B is boring, and think shield walls would be cool if they served a purpose, hear me out on my '2 birds with one stone' idea, that would make S&B vs S&B fighting and shield walls both relevant and fun:
Want more and battle effective shield walls? First -yeah, learn to advance in them, and make battle maps with absolute choke points/narrow fighting corridors -10-15 men wide perhaps?
AND
This is a perfect argument for shield bash! Make shield bash a reality, and the only significant counter other than kick? -THE SHIELD WALL! (make it so that when you get the shield wall + bonus, you also gain percent bonus to cancel the opponents shield bash against said shield wall, and possible immunity to kick as well)
Thus in the aforementioned narrow corridor, you stop the individual advancing shield bashers with a shield wall, which may result in either an advance of the wall, a defense of the wall, or counter shield walls forming in reaction, with ranged thrown into a stand-off.
-you know, like a traditional battle line, that seems to be how they actually did it irl.
???
Just thinkin outloud. Even without the 'narrow corridor' style maps these ideas may work really well if tried.