Yes, integrating it into Repier Monitor would be great.
But with it being integrated locally to each instance is already a good step forward. 1 click is better than 3, 3 clicks is better than 10.
You could create a "Virtual Printer" within the Gcode print menus whose only function is to represent a group of printers previously set.
Maybe even easier ... a strip of buttons in the Gcode print window that all you do is check the button of that group.
Something like those select / deselect all menus.
And take advantage of this new location to place a ... Multiplier !!!
Imagine sending the same file 10 times to each of 8 different printers in the easiest way. That's the idea.
Thing that the user only has to clean the bed and continue the queue.