@hockeydan, this DH support enabling/disabling the autoLock feature on the Yale locks:
It also exposes a custom command enableAutoLock and disableAutoLock which can use along with CoRE to enable/disable autolock using rules.
As @JDRoberts pointed out there upsides and downsides to both strategies, there are also SmartApps we’ve written and on the community to control locking / unlocking through SmartApps but that puts a bottleneck on the ST cloud/internet. However CoRE controlled autoLock has similar issues also.
My 2 cents, after spendings years with Schlage, Yale, Kwikset and other locks I’ve found Yale to be reliable and more flexible for something like ST compared to a Schlage. Schlage some locks exhibit some firmware bugs also, overall I prefer Yale when it comes to configurable parameters (like settings autoLock timeout, invalid code notification thresholds etc). Schlage has an Alarm feature built into it which is pretty cool, so it really comes down to what’s important to you.