That's the problem - Netflix doesn't work with small ISPs for openConnect, and even if they did, Netflix doesn't pay for the hardware or pipe for it.
Netflix would be totally on the good-fight side of this if they offered openConnect to everyone (and maybe kicked in some of the operating costs). As it stands, it leave a bad taste in your mouth when small ISPs get ignored like this - it's another strike against them that they shouldn't have to deal with.
Personally, I think they should use services like Akamai, which were built for exactly this situation, but it's possible that the content providers don't allow it. I suspect that IS the case, or openConnect wouldn't need to exist in the first place.