From the New Yorker:
Nation Desperately Hopes Real Reason for Bannon’s Exit Will Not Involve Sex Tape
The thing about Bannon is that, although people on the Left and libertarian-ish Right (hello, Jason) may agree that his anti-Globalist position is correct as far as short term military interventions are concerned (he was against the Syrian bombing last week, apparently), the way he is enamoured with a nutty book that seems to describe both global and national crisis in this present period actually indicates that his motivation for non intervention is founded in nonsense. And that's not a good thing. You do want appropriate US interventions, sometimes, rather than a view that some sort of global destruction is inevitable and will lead to the rise of a reinvigorated US. See this article in the New York Times which is the basis for this comment.
And besides, his anti-Globalist views on economics and trade have extremely little support from economists or experts of any variety.
It would therefore be a mistake to regret his departure, just because he might have made an appropriate call for caution on the one issue.