I've found The OA to be surprisingly endearing. The second season has definitely plunged into more interesting speculative territory, whereas the first season was a bit more reserved in its fantasy elements. I really liked the first season's atmosphere. It had an air of isolation, or separateness--as though its setting was dislocated from the world. The half-built, post-2008 environment of the subdivision supported that atmosphere, I think.
The second season has more of a Pynchonian vibe, especially given the private investigator plot line (which takes place in California, no less). The dislocation isn't there anymore, but it's a welcome shift in tone.
Anyway, I'm enjoying it. It's not mind-blowing or anything, but it's well-executed and just weird enough to pique my interest.