That wasn't hindsight, either, according to several sources in Shattered. He warned her at the time about that as well as several other notable deficiencies, such as her rallies being small and only catering to a tightly controlled set of close supporters, and her decreasing public visibility as election day approached. He also warned her about polling according to the authors of Shattered; that ceasing to do general polling altogether in favor of Mook's data analytics, which were cheaper, quicker, and far less accurate, would result in a massive blind spot. In all of these BJ Billy was proven correct, and she'll never forgive him for it.
The Clintons have been living separate lives for quite some time.
But now Bill appears to want to publicly distance himself from Hillary.
Sounds like they will finally go splitsville.