Hello Brian:

Well, it took us a little while but we finally addressed your request for the lease address to be added to dhclient DHCPv4 log messages.  The changes will be included in our next feature release, 4.4.0, due out Q1/2018.  

We like to thank our contributors by citing them in the release notes.  If you would like to noted in this manner please respond with how you wish to be identified.

Regards,

Thomas Markwalder
ISC Software Engineering