I believe you are incorrect sir, if a melee gets in your face, they are playing right, and it's your job to get them out of your face however you can (that's what teamates peels are for, you shouldn't just outdps a melee who got into melee with you. That's like a rogue complaining he's at a disadvantage because his throw dagger doesn't match your MB hits. The ENTIRE point of MS is to prevent school lockout, which there is plenty of at range.
That being said... if someone is right on you, make sure they have an SW:P on and do normal peel tactics... do you know how often apparition procs? and how much damage it does? If it's a melee on you, they won't have time to deal with it before it hits, they are already on top of it. Jesus, don't worry about MS, SA MORE than takes care of high damage, non-dot-eating, instant abilities. And with the proc rate where it is, it's non-RNG enough to rely on.