I personally use melee scuffle (but in RM2...) but I don't see much of a problem with it. First, because it's a skill on which one have to spend DP; second, because I only allow it when one has a "large" item in hands (e.g., a shield in addition to a one-handed weapon, a polearm or a two-handed weapon), making it not much different from developing TWC and getting a second attack; at last, because the defender gets a RR. So, sure, if used with your normal melee attack, you get an additional one, but only to inflict unbalancing criticals (which isn't that much, really) and your opponent even gets a RR (so developing TWC would be better); or you can use it with weapon brawling (and gets two melee scuffle attacks), but, not only do you have to develop yet another skill (weapon brawling itself), even your main attack (the weapon brawling) wouldn't inflict as much damage as normally; and using it alone (getting four melee scuffle attacks) isn't really all that helpful... except to push someone back, somewhat equivalent to a bull rush or tripping maneuver (as a note since someone
lamented it didn't exist in RMU).
At last, I personally think the more combat maneuver options are available, the better... not to mention I also play with the tumbling attack maneuver, which I find is waaaaaay more powerful (though it has its own drawbacks). Or the feinting maneuver.