Let's face it. The perk is not that great for a level 8 rogue perk. I had some ideas.
First off it uses the polymorph system / shape change system and has VERY limited forms. It's useless.
My idea was this:
When you take the perk it spawns say maybe 3 rings. You can use these rings to set up a persona, aka 'A Noble' or perhaps even a character name 'John Smith'. When you put the ring on it will change your name akin to the knave/druid system. Now you can change your clothing and become this new persona and live a double spy life infiltrating or whatnot.
Yes I know this still has some limitations sady. I also think for a level 8 perk where you are dedicating your PC to spying it's worth the boon that normally has come with apps or factions.