Sounds like the same options I have. I'm on a 2011 55" Samsung and can't use the film mode due to the lack of interlaced output from the ATV4 but used a review recommendation of reduce judder = 9 and blur = 3 which made a noticeable improvement to me.
I turned on reduce judder and it creates that horrible soap opera affect I was avoiding. Its horrendous. Reduce blur doesn't create this, but then I seemed to notice more frame doubling even in static scenes, almost as if ATV was dropping frames or something.
These are the only options on this TV (granted its a 2009 model) but again, it supports 1080p24 so none of these would be an issue if the ATV would just support resolution switching to its content frame rate!