Look at the way Corcules with his KMLink does this:
Corcules/ KMlink
Make a macro browser within the SD plugin.
The good thing about this is, that if the user reorganise the buttons on our streamdeck, it does not mess up the virtual RowColumns.
The only thing you have to add is an button identifier so KM could send your icon and title to the right button. I would be OK with the way you do this now; Button ID. Make sure to tell the user it is used for this image and title specifically.
I have no numbers of the people that use Streamdeck, but in my circle of friends the adaption is strongly increasing!