Here's the thing - if you want to engage in any sort of fruitful discussion of 4e (or any game) with fans or designers of the game it's probably best to refrain from statements that are designed to provoke hostile reactions. I know that when I see someone enter a discussion in attack mode I'm disinclined to treat them with any level of seriousness.
It is possible to discuss 4e in a critical manner. Posters like Kamikaze Midget, Lizard, and Reynard do it on a regular basis. The trick is to show respect for the experiences and insights of your fellow posters even when you disagree with them. It also helps if your criticism of the game is informed criticism.
Examples of Informed Criticism
- 4e's lack of Profession, Perform, and Craft skills messes with my sense of immersion because it makes me feel like my character has no life outside of adventuring.
- 4e's monster stat blocks don't tell me enough about a creature's overall abilities to use that creature in a simulationist way.
- There aren't enough utility powers that have a use outside of combat.
- Rituals take too long to cast. This limits my ability to use magic creatively in tense situations.
- The 4e Monster Manual doesn't give me enough information to effectively use creatures, especially new creatures.
- KM's Wrought Paper Tiger critique.
Of course, that's assuming discussion is your aim.