I know that MyGUI is stable and mature and that this lack of big updates is perfectly fine for us.
However, the lack of bug fixes and also the lack of attention to the collection of pull-requests leads me to believe that the project (hosted at http://mygui.info/) might not be maintained by Altren (lead-dev) anymore.
- Spoiler: Show
If we did we could eventually prune out the Ogre3D related portions/Not care what we do to the Ogre3D compatibility.