Here is an explanation of the changes from Magic R&D:
Skullclamp
Whenever one card appears in the majority of the decks played in major tournaments, R&D takes a long hard look at banning it. While the current Standard and Mirrodin Block Constructed metagames have room for multiple decks to succeed, and there are answers available to Skullclamp, that isn’t enough to make for a healthy environment. Every deck is required to warp itself around this one-mana card, and almost every successful deck abuses it. In addition, games that involve Skullclamp simply aren’t as much fun to play, especially when those are the only kinds of games going on.
no offense - but like WoTC said - there is room for multiple decks to succeed, and there are answers for Skullclamp...
so I personally feel this is a load of crap-ola...
did WoTC get paid off?...