River "going" and combat/result

Hey Arnopov, great to see you back! That is exactly how our group plays it.

Of course, Pike blocks have a rough time crossing a defended river now... But I cannot see Pike phalanx performing well in a river crossing historically.

Although it says that "for movement" rivers are neither good nor bad/rough going, the rules define good, rough and bad going earlier in the terrain section, and rivers are not in any of those.

I have seen it argued that rivers should be good going -for instance Bd facing Kn are better off in the river than holding the bank. That said I suspect that the Bd holding in a river will find the battle passes them by pretty fast, and have a heck of a time maneuvering.