I'm with you and Frank and the rest of the the folks who dug this.
It's obviously self-aware and not at all interested in naturalism or "realistic" plot contrivances. I was totally fine with the stylized, theatrical dialogue and the allegorical/biblical nature of the plot. Like Frank said earlier, I can also understand why that might not be everyone's cup of tea, but if you can get on its wavelength there's a lot here to savor.
Cast is good, but Harrelson is being under-appreciated IMO. Wonderful, surprisingly nuanced performance. A perfect foil for McDormand.