For an interesting perspective on the rule changes in Magic 2010 and Duels of the Planeswalker, you might want to check out this podcast with 2 of the original designers of Magic, Richard Garfield and Skaff Elias, and another game designer, Tyler Bielman. None of them are as heavily involved with Magic nowadays, having seemed to mostly move on, but it’s interesting to hear the difference between the original intent and design of the game and what’s happened to the game and its rules since. threedonkeys.com/blog is a legit blog with both posts and podcasts, so you might want to get a feed or monitor it if you’re interested in game design in general.