I went on the server in the first time in awhile to enjoy some good old TTT to find that one round later I was no longer playing TTT. Derp-Mode had quickly been activated and everyone was walking around as an Antlion, maybe it might be amusing for about five seconds, however any humo(u)r derived from that is fleeting. Seems nobody else was fond of it at the time of my joining either as it just makes the game mode stupid and for some unplayable. The only "Special" round that got any positive feedback was Detectives V.S. Traitors, which in my opinion is also stupid as I joined the server to play TTT not Team Death Match.
Simply put, these "Special" rounds are probably ousting more players than anything and are overall incredibly annoying.