Hi.
IMO Layer2D needs a rotation control with pivot at Center position. What do you think?

Yes, I thought it was already there ;p

Moreover, I think UV scale & scroll controls are a bit awkward without ability to set their pivot. It's always in the left upper corner. Remember I had this problem with UVs (viewtopic.php?f=41&t=1307). This trick doesn't work for Layer2D. I have to use Size which controls both textures at once. IMHO separate controls over UV pivot or Size for both input textures are needed...