Accepting this configuration is a work in progress, that’s why it isn’t fully documented. The team is aware of the requirement for it.
Currently, it doesn’t replace the usage of a custom device presentation as not all properties are accepted.
Yes, it should work for any capability
This was set to 1 because there were some inconsistencies observed creating routines that turned on the device with a 0% level in the dimmer as 0 represents “off”.
You can still send a 0% value through the API even if the presentation doesn’t allow it, the default range of the capability is 0-100%