I would be interested in changing to the Gen5-stick, too, because the Z-Stick2 is hanging from time to time and there is no fix for this issue (plugging out and in again is no fix for me).
As you can read on the OZW-page Gen5 devices do not play well ATM because of Security CC.
Maybe it is worth testing it. I am considering it, but it is really time consuming to migrate all my devices to a new stick...
With Gen5 you get the ability to use door locks and you will get a more responsive mesh network.