Playtime is not supported right now, but I can add it as an update as an extra command like \MN; it should not be too difficult.
Yes, right now, it only lets you manipulate the main menu and some global settings, such as Left/Right input for example. I can't say for now if custom portraits for other menus will be supported soon; I like your suggestion, but it might be more complex than adding the playtime, for example.