Well I hope soon we'll be able to edit a Secret Base's structure (I mean the decorations, the position of the Secret Base leader and the Secret Pals, not the PC) with PKHeX through a tab that shows the current decorations of a Secret Base (none if there's no decorations placed), and I hope you can edit the pokemon shown in the Time Travel Award (I mean for other Secret Bases, to like create custom Secret Bases to explore and battle in.