Hmm, makes sense when you put it that way. I have no idea how mm works, so I wouldn't think having certain weapons equipped would factor into the equation. Lately, I've put my thorn to rest so I can get better with other weapons, and not rely on it; but I haven't really noticed a difference in the other team's skill level. Still though, I do good on some, and bad on others. It also depends on your teammates doing well.