I feel that Konami nerfing the six sam this early shows they don't care about individual consumer investments. They introduce a deck that they feel is too good. Neuter it, then release more powerful cards in a power creep anyways. Will they also limit Neos Fusion? that cards pretty broken. What about Ancient Gear Dragon or fortress?
Others can wait, but six samurai lock most of the deck early with so little effort, and with six saurai united, you will never got an empty hand, or at least back row. It can be said that most of time other deck will screwed up the moment enishi and Shien Pop out, mostly in the first turn. Be grateful they only limit some of the cards. Neos and GEAR DRAGON DOESN'T REALLY lock you up, really.