Doesn't that sound like a filming problem then? Clearly 48FPS is allowing more detail and you are seeing the actual fakeness of what's being filmed and the props and CGI. This to me just means they need to do a better job with makeup, props, CGI, lighting, etc.
24FPS in the past simply made it easier to hide the fakeness of what's being seen since a fantasy movie IS mostly fake.
That was part of the problem, but even in scenes without any special effects it just felt "off" to me. Actually the more action there was going on the more OK the 48 fps felt. I really went in with an open mind, I'm not a "purist" by any means; I prefer digital cinematography to film for example (however, the early days of digital movies had their problems too, so maybe 48Hz will get better ?). The opening scene where Gandalf meets Thorin, in Bree I think, had the feeling of an old (and I mean 70's or 80's) masterpiece theater presentation, with the 50 to 60hz conversion. I see 60hz footage on TV all the time, news, special events, sports and its all fine, I don't get this weird sense of something being wrong.