(thats why cavalry swords/scimitars/katanas/leaf blades and such had a curve on them so they had "draw" when they hacked/rode/ran past)
(and with magic super science extra almost anything could gain some interesting property's)
i think some attacks should require channeling/rooting and be interrupted and others should just be limited by animation timer although i think most ranged attacks should have a verry short channel time as a minimum like .1 second or require you to be stationary to start activating to stop people just holding down back and firing at melee and melee should have some attacks that can be used on move preferably at least a few power sets with a short lunge and a very short root on one of those powers so you have time to use a stronger attack on someone running away but not so long(or stunning) that its incapacitating (on its own, maybe a whole chain of attacks on a CC oriented character should be incapacitating if specialized for it) with spamming once you catch someone, their needs to be a balance of course which im sure will be found in a happy place for most if not all