Unless I've missed it, I don't see an image translate node.
Normally it might add black or transparency to the portion of the image that is missing after translation, in that sense it can probably normally (if messy) be achieved with a cropping and letterboxing.
However, for those users dealing with 360 images/video (increasingly common) a horizontal translate requires wrapping. Again one can achieve this messily with the tiling node.
In both cases an image translate would be "nice".
Allow the composition author to provide a custom Layer (or a group of Layers) for each component of each UI widget, to completely customize the visual appearance of UI widgets.
Proposed new nodes:
Make Action Button Theme (Layers) with the following Layer inputs:
Make Toggle Button Theme (Layers) with the following Layer inputs:
Checkbox: Toggled and Hovered
Make Slider Theme (Layers) with the following Layer inputs:
Active Track: Hovered
Inactive Track: Hovered
You could then create your own Layers (using Vuo's built-in Layer nodes, or using custom images) to feed in to these nodes, and the UI widgets would display the appropriate Layer(s) at the appropriate times.