Image Library updating/Rig source updating

[TVPUSER]

I know it is still early days for rigging, and to be honest I don't have a complicated use for rigging but I mainly want to use rigged layers as a replacement for the old keyframeFX workflow
Once you create a rig, it seems to be a one and done deal in terms of the images you are using for it.
I suggest having the option to update source images in the image library or to reassign the source to another image in the library.

Speaking of which that is really the main issue I have, right now the ease of keyframing and previewing are so much better than keyframeFX,
I can't help but wonder if we can just generally have an update to tween transforms in the software in general now.