I've found OSMC to be great, even on RPi2. I tried LibreELEC recently and couldn't get live TV to work acceptably with a USB TV tuner (glitchy). I ended up somewhat going down a rabbit hole of USB isochronous/asynchronous/buffering settings but just went back to OSMC.

You can also use apt to customize OSMC because it's based on Debian[1].

The maintainer, Sam Nazarko seems really helpful too.

[1] https://osmc.tv/wiki/general/installing-packages-via-apt/