As for the perceived criticisms of 4e:
the Slacktivist is my go-to. It's explained in the context of politics and morality, but I think it applies in this specific case: there's a lot of people out there who just look to take offense, and it has a lot more to do with
them, and their view of themselves, then with the thing they're taking offense about.
As for the meat of the article:
First, I really like that they explained Vancian spellcasting and why it is important to D&D in a way that haters might be able to at least accept. Yes, it's important to have. No, it's not going to be required to play the game. Yay.
Second, in my view, fighters are not necessarily defenders at all. They are masters of armed combat first and foremost. One of my running theories is that equipment for fighters is like spells for wizards: this is what helps define your character (not that you can't use extra things you find along the way). Wizards get fireball? Fighters get flametongues and icebrands. Wizards get Disintegrate? Fighters get vorpal blades. With all the weapons and armor they get, fighters dominate the combat realm. The
should be able to upgrade weapons and armor without relying on finding treasure, just as wizards gain spells these days without relying on finding treasure. Want to give the fighter plenty of options without relying on powers? They are the
crafting class. They make what they want (often out of the hides of their foes -- dragonscales in your armor, beholder eyes in your helm, frost wolf pelts as your cloak, a fire elemental bound to your blade). Treasure then becomes an extra (just as it could be for a wizard looking for spells).
I also am fond of stances, of how they interact with basic attacks to add effects to your normal attacks rather than entirely replacing your basic attack with some complex ability suite.
Third, I am on board with how they're thinking about monster stat blocks. I am fond of the 4e method. But I think they need to be thinking about the role of monsters more than in terms of stat blocks. Combat stats only take you so far. They are not enough. You need much, much more for a good monster.