Could you maybe create a plugin that works as a wrapper for FAR plugins ? So users could install and use plugins designed for FAR. The comunity behind FAR is very big, with a lot of plugins developed for all kinds of situations. If you could create that wrapper you may avoid having to rewrite all those plugins.
I realize that FAR and SS behave differently in terms of UI so maybe some plugins will not work but i still think it's worth a shot for some other nice addons that FAR has.
(CanonCam for example).