So my zigbee variant of the Yale YRD256 is working "better". Rule I've created to verify door is closed (via a recessed sensor) and lock is unlocked then lock the door after a slight delay does not fire all the time for some reason - seems to fail if I haven't opened the door in a while. However the lock always seems responsive to unlocking via the device page. Lock codes and reporting from the lock seem to work as well.
When my lock had the Z-Wave module in it it would just stop responding from time to time, Had trouble pairing (beaming or something, I guess) even though I tried various festive things like relocating the router and adding repeaters etc. This was/is also true of my older Z-wave Yale lock.
I don't know what is going on but frustratingly cannot seem to replicate the problems in a timely matter and I don't really have the time to dive into this when there are so many other things to do - it's working well enough. Anecdotally though (reading through all the threads, seeing common themes) HE seems to have issues with lock handling for some reason - maybe a lower level system issue I dunno.