Ah, Matsume. We meet again. ;D
I understand where you're coming from, but the hours I work are as long as they are erratic. One night I might finish at 10pm, the next it might be 3am. I guess I was kinda hoped for something like I described. It'd still prevent overuse; one harvest every 24 hours from the specific node, but if remaining unharvested the node will remain. That sorta thing.
People will make timers for the nodes anyway, and people will be sure to use them, so I don't really see how it'd be so different outside of twenty botanists all crowding around a single tree.