This is one of my pet peeves on social media. Nothing is worse than vague references to personal issues or something requiring inside knowledge, while the person refuses to elaborate (not saying this is true here, I haven't dug into this issue). If you're going to make it public, decide to actually make it public.
He could have expressed his concerns in a coherent blog post, that maybe could have sprawled a more serious discussion, we all know he's a good writer. Choosing to do this in a series of tweets tells just one thing - "nothing of substance here, move on".
