At the moment we have to set a fixed size for icons inside a label. I'd love to be able to have it just use the dimensions of the label itself, so if the label gets longer, the icon gets longer too.
The use case is using the icon to put a fancy background shape/frame around the label rather than just a rectangle.
It would even better if it would actually resize vector shapes properly rather than just stretch them, too (at the moment if you do Convert To Label on a shape node, then go into the label's icon properties and change the size, it stretches it, meaning the border changes width and radiuses become elliptic etc. There are numerous reasons why having to do Convert To Node -> resize manually -> Convert To Label again is irritating and a bad workaround).