Question: Anyone ever played Right-hand vs. Left-hand?

[Imp]

Your free to set them up as you like either split the weapons company & cross attach it or take the weapons company if the OOB has one.
Open terrain separate weapons company with ATGM, MG, Mortar etc could be better if the leader hangs back with them but certainly have very few issues with them either way.
Cross attaching is just common sense for the game so you might attach your AAA assets to the weapons company as they are in the rear but not your scouts & engineers.