Recently, Riot makes changes on Kassadin crazily, and they release a plan averagely every two days. However, the plan will be changed again in almost a week. And the opinions are divided about Kassadin on forums. Then how to modify Kassadin so as to achieve the goal of game balance and everyone will be pleased?

S4, PBE, Kassadin

Actually, most mid lane assassins have been nerfed after S3 World Championship, except Kassadin, who always appears on the NO.1 place of ban list thus seldom appears in world champions
or matches.

S4, PBE, Kassadin

We can see that Kassadinís ban rate is far higher than that of other champions. He is always the NO.1 on the ban list since S2 regardless of version update, rising and declining of other champions. Why?