Ngon creator (Modifier feature)

Fill with Ngon face from loop: You select a group of vertex that connect each other, then apply Ngon maker Now the selected vertex fill the inside of them with a Ngon face.

Other use might be to select multiple faces and then apply Ngon maker, so all the faces are now mixed in a single Ngon face.

This should be a Modifier feature, that is used specificly to create Ngons.