I've been thinking about Murne as an alternative to Hera. She has the Spy trait, and plays well with card drawing. In our current meta, you could reasonably take "Fool me Once" with Murne: it cycles a 0 point card for a chance at a better card, and Murne (unlike Mak) can eat the 2 damage without worrying about tempt/lightning/force choke death. Murne can use Intelligence Leak and even Comm Disruption as a secondary Negation (or Negation-block), and can Strategic Shift your Rule-by-Fear or Planning'd opponent back to two cards.
Hera's pretty efficient with her "take your pick of deadeye, positioning advantage, or blitz once per turn," along with a full squad "rank and file" after deployment, and her attack is significantly better. And Hera gives you a fallback character for Tools for the Job and On the Lam after Han got element-of-surprise/IG-sassinated on round one somehow. Hera's attacks are better, although Murne + Focus gets close, and she has a surge for range, which Hera lacks. False Orders is nothing to sneeze at in a meta with riot troopers, either: "Just march yourself right back off that box, young man!" Murne's command card is playable; Hera's is a weird blaze-of-glory combo sacking a smuggler to re-use Chewbacca when your opponent wasn't expecting it.
So it seems to me that the question is: where does the extra hide go?
Assuming you can beat your opponent's card count (planning, strategic shift, R2-D2), part of Murne's power seems to be her ability to hand out the hidden token. Dropping accuracy is always helpful -- you can drop hidden on a smuggler in round one and have -4 acc to it for the rest of the game -- but who in rebels benefits the most from the extra surge while attacking?
Jyn seems like the top candidate. Rolling GG (or GGG focused), she's not guaranteed 2 surges by any means (especially against Jets or 3P0 boxes in our meta), and her surges are both very valuable. The -acc is helpful if you encounter ERangers, I suppose, but doesn't help with fly-by (still a guaranteed hit).
Another place it seems likely to stay un-wasted is on ESabs: double-piercing with overload gets you that much closer to stunning Vader, and these units are still viable objective runners on Raining Freight, Spoils of Crime, and Concealed Treasures. Plus if you run ESabs and Murne, Comm Disruption just went A-list.
Lando has some decent surges, and you might want to "Gambit" his yellow die into a red.
Han, Drokatta, and Chewbacca all have useful surges, but none of them seems to have trouble coming up with them, especially if Han is focused.
Ahsoka and Jarrod have a wealth of surge abilities ... but you have to keep them alive until round 2 to get use of them.
Hera, ironically, can use the surge help, as it brings her double-surge pierce 2 into real contention.
I'm not sure I've even convinced myself, but Murne is such a unique figure, I'm tempted to look into this more.