From the other thread:
I'd probably actually prefer for both DoTs to be castable regardless of form (I prefer to cast them myself, I don't need, or want an autoattack to do it for me and I am eternally grateful they're letting me manage it myself for Affliction for the first in years). Meta, and by extention Mastery, could then buff Meta's exclusive attacks, meaning Molten Core procs could be used in Meta (assuming a reduction in the Fury cost to make it effective to do so) as they are in caster form.
But would that make the spec too easy? Possibly, possibly not. There are still Wild Imp and Dark Soul timings to consider, and managing Fury will still be important. It would however be smoother and more intuitive to pick up, and Meta would feel more important than a DoT maintenance tool, that's overshadowed by the chain of Soul Fires you get from MC charges built up during it.