Hi James, well it's been something I've been planning on adding for some time now but your particular request about it bumped it up!

One thing that tends to make me hesitate in this area is that once script interfaces are added it becomes pretty difficult to change them since there gets to be various things depending on it. So if I mess it up it's something that easily stays messed up for kind of a long time... But here the equivalent is already in there for curves so I can follow the same structure for faces too.

- Michael