Also when it comes to being bound to the land - the Sartarite cottar might have serious practical economic issues with leaving, but isn't legally forced to stay. This isn't serfdom by any means.
I like this - it further makes it clear that the status of the cottar is as a client and non-landowner, not a serf.
I'm less certain about this - if you can't maintain Free standard of living, I believe you're likely to slip into a Cottar state sooner or later. This is a status society, and if you can't display your status, things might go poorly for you next time there's a land use redistribution. Although perhaps there might be mitigating factors - everyone remembers how you held the line in That Battle, or you might be the only one crazy enough to run the Rotwood Stead and no-one is taking it away any day soon.