I'm a huge fan of LED's but at the same time, I've heard the same thing from others in my local club that have been at this for a while and went back to MH or T5. I say go with what you are happy with and what works best for you. If the LED's aren't cutting it for you and getting you the results that MH was, then there is no reason to not go back and maybe add a LED accent strip for additional color pop.
There are so many different things going on in each of our tanks and so little that we know about all the different corals and things we keep as compared to what we actually do know. What seems to work for one person, when duplicated by another person, sometimes just doesn't work out. For instance, I've got a friend that runs his tank at the same parameters as I do, similar equipment, salt, supplements, etc but for he cannot keep a birdsnest alive for the life of him. On the other hand, mine grows like crabgrass and I am always trimming it and can't kill it.