That's my fear, he gets nerfed. I've actually contemplated taking him to 5*s instead of my carriage rider eddie, but I'm hesitant to make that investment only to watch him get nerfed soon. Then again, carriage rider already got nerfed and I need a strong magus ally more than another strong eddie. Decisions, decisions. At least I've got a few days before I get the evo shard from the magus dungeons to decide!
Sorry for the rabbit trail.