I really believe Riot purposefully makes certain items too strong in random patches just to keep players interested. Same thing with new champions on release. They give them high stats and too strong abilities, to entice you to play them (which means you have to buy them, so they have money in mind when they do this). The same thing has been happening for a while now. It's a clever but shrewd tactic that seems to be working, or else they would not keep doing it. Anyways, I just dont like the fact that they are purposefully messing around with champions stats and in-game items, just so players try out different things (and of course their main reason for doing this is to make more money).