Freelook on my mouse 5 is helpful. Looking around while moving is very useful.
No other remapping needed for me, because i use my nostromo speedpad n52.
I have macro's for: "LEFT" "RIGHT" and "CHARGE" in teamchat. Saves some typing when trying to lead in battle and allows me to shout "CHARGE" while fighting.
Oh, i also two macro's for convenience: one that just keeps the rightmouse button pressed (permablock) and the other that keeps rightmouse pressed and also keeps W pressed (block and walk forward). Used to use them a lot during long, tedious strategus battles.
(Yes, i know you can block, walk forward and open chat to achieve the same effect, but i like having it on a button.)