It would be enormously useful to be able to lock the Editor Viewport onto a Metahuman’s face while animating with the facial rig. If you have a character that is twisting, turning, moving, collapsing, etc, you have to manually reposition your viewport camera to keep up with them. Are we savages? Are we no better than lowly beasts? I think not.
(A viewport “lock follow cam” would also be useful for metahuman body control rigs, but faces are so fiddly that I’d prioritize that, please and thank you.)