First, I know I'm using an unsupported version of Unity, though I tried this in 5.3.0 and it still happens.
So, I'm using Vector Images to utilize icon fonts, but when I try to scale the image, the icon does not scale. Changing the size mode produces no discernible effect. If I use a button with a vector icon, changing the padding merely displaces the icon in relation to the side I'm padding. The bounding box for the UI element may change, but the icon always stays the same size.
Am I doing something wrong? Has anyone else had this issue? Is there some code I can edit to make this feature of the asset compatible with 5.4.0 or is it something that is far too complex and must be added in a future release?