Spoiler alert: if you apply, you aren't likely to get a reply. I never heard back, either.
In the meantime, I made a driver which is ready for beta testing, based on info that I cribbed from python-decora_wifi.
The code and installation/usage instructions are here: GitHub - tomwpublic/hubitat_myLeviton
Request for input: switches and dimmers are combined into a single child driver. I am interested to hear whether this creates any confusion or issues for users that give this a try with various Hubitat apps and extensions.