Wholeheartedly agree. I played a Def to 50, and loved it. Got my kheld (after the fixes) and loved it right up to 34, when I5 hit. With every bit of tactics and strategy my mind can muster, I can barely survive a fight with a standard group of mobs, and this is after firing off my heal twice and having every applicable defense power up and going since the start.
CoH has moved away from the concept of "you can team if you want, and you can solo if you want" to "You can team in this game, and I *guess* you can solo, but we wouldn't recommend it". That was the thing I really truly loved, I could team up when I felt more social, and solo when my mood was less than pleasant. No such luck now. After trying out the I5 for 3 days straight, I could barely stand it, and god forbid I encountered a boss solo.
But I'm not gonna sit here and do what most people do when they're upset by the nerfs. I'm not gonna threaten to quit... no sir. I did it, two weeks ago (just stopped by to see if anything has changed).
So long, CoH. It was fun!