What is the point, then?
When is the opportune time? Could it be January 2019?
Releasing the docs will be the travel ban x 1000. Fake News fueled mass hysteria will sweep the country. POTUS needs to weigh all the costs and benefits before he drops the hammer.
It’s very likely that Democrat criminalty isn’t going to matter to most people. Democrats don’t care. Never Trump Republicans don’t care. Brain dead “moderates” won’t care. Etc., Etc. Sadly, this has become little more than red meat for Trump supporters. So maybe Trump saves it for election season GOTV efforts. We shall see.
When the government class can commit crime with impunity and no consequences, then, in fact, you live in a totalitarian state.
They only question becomes, who is really running the government then. Apparently, it is not the president.