here’s the link to the custom DTH for the Eatons. Cooper Aspire Scene Controller RFWC5 and RFWC5D Device Handler [beta release]
I have two of them and they’re fantastic (if you have a DIY heart and don’t mind learning how to use WebCoRE) you’ll have to either use ZWave direct association between the Eaton and devices or use some kind of button handler. (I am ZWave heavy and use ZWave Direct Assn. and use ST to monitor the state of devices and manually update the lights on the Eaton to show state. This way if I lose the Internet I only lose the lights on the scene controller and whatever device I’m controlling still works through the outage.)
As @JDRoberts mentioned, you came in at a weird time, you may implement something only to find you have to change parts of it out over the next 12 months but it’s absolutely do-able.
Also, your design philosophy is almost exactly mine. Hide everything, automation heavy and local processing are high priority.