I can recommend the Nvidia Shield [0] as an alternative to dealing with the Samsung firmware. I bought it after seeing it recommended here on HN. It's snappy, it has the apps that I care about (Plex, Youtube, and various Australian public on-demand channels). Also it pretty much just works. It turns on together with the tv and you basically don't have to deal with anything Samsung at all anymore. It has some gaming capabilities but I never tried those and don't care.

[0] https://www.nvidia.com/en-us/shield/