I started my first grow with MG, and fought the time release nutes for the first couple on months. Replanted with Peat, composted peat, and vermiculite. Have had great luck since then. Nute, Water, Water, Nute.
I would agree that it is not the easiest for beginners, but gets easier after you learn the signs of nute burn, and can decide when to taper back.
Then again, if it works for you, then why change.