Eh, you might as well ask "who does Robert Beltran think he is" as he's been harsher.
They worked on the shows, they are bitching from quite a different perspective than whatever we might bitch about.
I think Beltran, and Ryan, and Blalock are quite right.
Fortunatly, Voyager and Enterprise do have some good things going for them.
Edit: And I had no idea until yesterday that Piller kept the Roddenberry bible after he (Roddenberry) passed.