In reply to Dōvy Paukstys.

I've two quick ones:

If I select a block collection with setting set to "Only," and there are no blocks available, display a message & suggest user change a different library or "Any" option.
When I install the plugin, I didn't really saw the Templates button in posts. Only after activating Redux Lite's admin page demo, I started to see it. Could've been a one-off.

All the best with the plugin. Will try it more and see how it goes. :)