I get why people may be fed up with those tones, or seeing that gear listed all the time but:
Glenn is not capable of coming up with any production or mix to the standard of Sneap, Richardson, Lewis, Bogren, Date, or anyone else. They all use a variety of gear and get different tones on different projects. He can try and use gear he thinks they use, or not, but it doesn't mean he produces work that sound anywhere close to guys on that level. When I say production, I don't just mean the engineering aspect, but also the overall quality of the songs and artist. As much as I don't really care for his tones, they are absolutely not the biggest thing holding him back. The fact that he doesn't take any responsibility for the quality of the band or songs, and instead decides to blame everyone and everything else is what does it. Perhaps if he could play guitar better, he'd be able to help guide his clients through making their guitars sound better. Its no coincidence that many producers just happen to be killer guitarists. The gear Glenn is or isn't using isn't whats holding him back - its the shitty attitude, stubbornness and contempt towards musicians (as in, the people who are paying him).
He uses a particular reverb based on what some other engineers also use, and yet Glenn has some of the worst sounding drum reverb I've ever heard - the gear has no real bearing on it, its what he is choosing to make it sound like, and ultimately his taste that decides.