my idea is to introduce egde loops to retopo tool. Like in edit mode after hitting a shortcut loop would be created around the model aligned to view or selected axis, with number of vertices to be input by user or auto deployed for best appearance.
next loops if crossed should snap to previous vertices, to form a mesh.
also it would be cool to introduce loops floating on a surface (like when you model eyes or lips) scaled with mousewheel for example

it would be a good idea to allow creating multiple compositing node setups, this would allow for example to add different compositing options for different strips in sequence editor (requiring probably to create an vse strip input node)