Touchup: Draw triangles manually

If I delete for example a tree which near edge of a tile then no hole filling tools are available as it doesn't find holes on edge(why?) so need an option to draw triangles to close the hole border and then apply hole filling. Drawing a free-form surface would be also nice so we could close holes manually. The tools in CC touchup are much better suited than broken workflow to export model to OBJ/DGN for retouch.