You mention use of the F2 addon in this video, and then demonstrate the walk/fill behaviour of the Make Face command. My original question revolved around some weird behaviour I was getting when filling. After doing a bit of research, it appears that F2’s fill edge behaviour was rolled into Blender 2.7.
The weird behaviour relates to using Make Face with 1 vertex selected. With F2 enabled, filling using a vertex will create an orthoganol quad using the selected vertex, the 2 surrounding vertices, and a 4th derived vertex. The default behaviour simply makes a triangle.
If you want to test this behaviour: Create a box. Randomize the vertices of box. Delete one face. Select one open vertex and hit F.
Alternatively: Delete one face. Create one triangle by selecting 3 vertices. Attempt to fill the other triangle by selecting 1 vertex and hitting F.
At this point, I’m not sure what the practical application of this would be. Is the F2 addon useful anymore, now that Blender replicates the walk/fill behaviour? Is the bonus behaviour with single vertex filling useful?