What league? GSL, IEM, GML and any other league. 3 Barracks marines with bunkers against zergs, against toss, which almost automatically kill zergs, who do not open pool first. Proxy bunkers on protoss natural which delay his mining for minutes for the cost of 25 minerals.
Yeah, we see terrans proxy barracks once in 1000 games. You need to remove some zeros from that number.
So for me 3 proxy barracks is the same s@#t as the cannon rush and if nerf cannon rush, I want that thing to be removed too.