I've been a Defender Titan since the game came out only switching classes long enough to upgrade them. I have a hard time believing the Hammer Titan was op, instead I just think they made the change to please little crybabies that wine for anything. I hate being killed by Blade dancer after I shoot them point blank with a shotgun but you don't see get crying for a nerf. Instead I just learned to change my play style when they were nearby.