As you can see OH 2.5.11 is out: it includes some bugfixes for the openwebnet binding related to dimmer lights mgmt and the USB Zigbee part.
I want to encourage you to respond to the 2 polls about new features for the official openwebnet binding: that’s an opportunity to express what is more important for you and should be prioritized.
I think 23 answers are not enough: there are many more users using the binding!