No group of players is gonna overthrow the FO. What they can to though is appeal to the owner, or in this case, most likely Dennis Lauscha. He's really the guy who can fire DA.
I'm not sure they can do anything about Loomis. Maybe promote him to some other position and hire a real GM.
The light at the end of the tunnel is that Loomis is 67. He can't keep doing this much longer, a promotion to a less stressful role seems like the ideal move to save face for him and for the good of the franchise.