Hey DU, thanks for the rate! Always love getting advice from top players.
I've tried both your suggestions, together and alone. Snorlax is good, I'm using a Leftovers set with Body Slam and it works really well, especially considering it does what Meloetta had done but better.
About Shaymin: It's a good alternative to Rotom-C, but I feel it changes the way the team plays out too much. Natural Cure is awesome, but I Volt-Switch makes the other 5 pokes better, which is irreplaceable. Hopefully it makes sense.