@Lowa: Concerning the LED placement -> Just swap the positions with the 1x1 tiles positions. So you will have more space against the outer case. Old do you also have a dividing wall between the buttons and the top studded part?
I really like this switch! But to add more flexibility for which function to use it and also to help naming/numbering it, I would like to have the same number of studs as the original switch. So we can apply custom stickers to e.g. to 1x1 or 2x2 tiles. Hope the attached sketch illustrates, what I mean...