This has been discussed in the forums on the individual device threads . The Jasco/GE models were certified by the Z wave alliance in June, they have not yet been released to the market, but I would expect them to be out in a month or so as the marketing materials appear to be complete.
You can find the conformance statements for them showing the certification on the official Z wave alliance site. You just can’t buy them yet.
All of that said, I’m not aware of any improved security features in Z wave plus versus classic Z wave. There aren’t any announced on the Z wave alliance site.
There are significant improvements in other areas. Consumers will immediately see the benefits of longer-range and longer battery life. Devices can also be made somewhat smaller.
There are additional significant technical improvements with regard to network management, particularly in place pairing and over the air firmware update. But nothing regarding security.
Personally, I would choose zwave plus whenever available just for the range benefits. And for mains-powered devices the improved inplace pairing is really nice.
But if you’re just waiting because of expected security enhancements I don’t think you’re going to find them.
I think some people are confused because some of the first Z wave plus devices were released by Aeon labs, and they also added enhanced security features to all of those models. But the same security features were available for Z wave classic devices, it’s just that Aeon hadn’t used them. So they were able to advertise their new Z wave plus models with enhanced security, but those are actually two different sets of improvements.
If you want zwave plus now, dragontech, Zooz, and homeseer have devices available for sale. It’s probably not a coincidence that all of these are new models that are not replacing previous Z wave classic models. I suspect Jasco and some of the other manufacturers who were making Z wave classic models are waiting for some of the old inventory to sell off before releasing their new plus models.
Reports on the dragontech wall switches have not been great, but their pocket sockets ( made by a different manufacturer) seem to be fine. The others are all very new devices, but reviews have generally been good. There’ve been a couple of bad reports on the Homeseer switches but most people seem to have had good luck with them, so those may have just been individual defective devices. It does happen.
Try www.zwaveproducts.com and www.thesmartesthouse.com for these, and of course homeseer for their own switches.