Actually according to Janes (I subscribe) it is MLRS (Multiple Launch Rocket System). That is the REAL name of the REAL weapon system used in combat today.
Now that being said, Renegade uses the MRLS denotation. Not sure why, fictional game and all might have SOMETHING to do with it. Perhaps they are trying to distance themselves from reality. Go figure, a game not portraying reality, what has this world come to?
As for tactics, there are tons that are not used. Have you ever seen an organized flanking maneouver? Probably not. Requires teamwork and COMMUNICATION! This game has neither. What about diversionary tactics? Never used, why? Same reasons, no teamwork and no communication. We could go on and on for days on end and the conclusion would be the same. Teamwork/Communication, Renegade has neither.
Laters.