No one is saying they shouldn't. By all means leave feedback. But the same person leaving the same feedback over and over doesn't accomplish anything. It takes thousands of different voices leaving the same feedback to get noticed and change to occur.
Aveyond has spent every patch release since 6.1 bashing the game and trying to push their personal fanfic as the "savior" of the game when general reaction to their ideas has been negative.
How does the saying go? The definition of insanity is doing the same thing over and over expecting different results.
The results here aren't going to change. The game is in the hands of the developers and they have set their course for Dawntrail already.