Hmmm. Some of those quotes are downright cryptic and hard to believe given how hard Bannon worked to get Trump in office. It’s not like Bannon is suddenly a democrat in ideology, so attacking Trump really only works against his own well-known political ends, whether or not he had a falling out with Trump.
Without any context, I assumed Bannon’s “ouster” is really him leaving to wield more influence (to the benefit of the Trump administration) back at the helm of propaganda machine Breitbart given the original goal of getting Trump elected was reached. As in, he can help them better reach their mutual objectives while with Breitbart rather than in the cabinet; putting that in writing now, though, I realize it wouldn’t make much sense.
That said, a more predictable scenario is one where Bannon still gets to advise Trump in an “unofficial” capacity while now also being officially (read: technically and perhaps legally, but not ethically) freed to concurrently coordinate Breitbart’s propaganda. The members of this administration have proven themselves negligent at best where it suits them with regards to clearances, titles, and conflicts of interest.