Well, speaking for myself (-Louis- knows I am one elite spell caster
), I do find that this would change the gameplay. Why? It's not easy to cast spells from different spell casters at the same time. And it's basicly there, and how you micro (spell casting is micro), and macro, that winning the game resides (I mean normal maps, of course). With that hack, anyone could outcast a gosu player, eventually giving them the win (they wouldn't, because any gosu knows how to get around spells
). But, well, the most it could do was to give advantage to people in the same ladder of 1337ness in SC.
At money maps, this hack wouldn't change anything at all.