As far as I've seen for units so far, there's just the two modes; guard mode and regular mode. Both are all well and good, but they're for using the unit. I'd like to see an "off-duty" mode.
When a unit is turned to off duty, it'll basically just be free roaming. I figured it would work so that off duty units could wander within the confines of a banner area you have, or if you aren't near any of your banners (for example if you set up camp while travelling), they'll stay within 64 blocks of you. That way they won't just wander off, but at the same time they can act like... well, people, if you don't need them.
Plus I'm building a huge walled property in the lone-lands, and I'd like to make it feel like a community.