I'll be honest, we've tried so many times to save tf2 and the most we've gotten is valve logging in to their TF2 Twitter. The hell is signing a petition and mailing it to their office gonna do?
Despite the bots the player count is very high and stable. People are still buying keys and items regardless. Plus making games simply isn't valves business anymore, they're a games store and a hardware manufacturer, not a studio. Whether tf2 lives or dies doesn't matter to them, it's negligible relative to valve.
I love the game, it's probably my favorite ever but I'm also a realist. It pains me to say but I don't think this is gonna go anywhere.