Hi,
Running OSMC on a RPi here with great results. As you know these systems can be a bit cramped on RAM, and as far as I have experience it, the second most RAM consuming task on my RPi with OSMC besides kodi.bin is OpenSSH.
I replaced it with DropBear (Dropbear SSH) which is already available on the default package repositories, it’s basically a drop in replacement so no further configuration is needed, and because of its small memory footprint, it’s much more suited for small, embedded systems.
Regards