I tried getting back into Magic after an 8-year hiatus, and so many of the rules had been changed and simplified that many of the subtleties I enjoyed from before were no longer options. Felt like I was paying hundreds of dollars to turn a dial on a deterministic mechanism...
I kept thinking "well, this is just because I've been out of the loop; with time, I'm sure I'll discover new nuances". But after chatting with power players and reading through forums for a few months, I never saw any evidence of that.
Still a great game. But a very different game from the one I fell in love with in 1997, and also a different game from when I last was really into it in 2007.