I think it would be good if there was a feature in synfig that shows a dialog that helps user to locate missing files instead of just showing them as errors.
And a feature to copy all files used in the project to one folder so it can be easily shared along with the project to another Synfig user.
Another feature I wanted is something like a synfig module for python where the people making plug-ins don’t have to work with the raw xml but can manipulate it using a python module.
Then one last question. When is the next stable version of Synfig planned to be released