
For the longest time I feel like this card never really hit its full potential because the game designers were afraid of printing something that would be too powerful with Double or Nothing. For example, I don't think it's a coincidence that the only 2-class combination that hasn't been used yet is Rogue/Seeker. The card combined with a Fingerprint Kit and a Deduction allows you to potentially scoop up 8 clues in one action, and with stuff like Higher Education boosting you it's not very difficult to pass the doubled test on any shroud location. Finn Edwards could pull a weaker version of this off, but he had to settle for level 0 Deduction and had to dedicate his limited off-class slots to it and he lacked the card draw that Seekers had. But now that Mandy Thompson exists, you get access to scooping 8 clues a turn and are able to piece that combo together very well due to her amazing card searching.
Additionally for the longest time using Double or Nothing on a big-deal combat attack sounded like a pipe dream because it was generally very difficult for you to be able to boost your combat high enough to be able to safely pass the doubled test, and many of the common Rogue weapons relied on you succeeding by 2 or more to have full effect. Now that Tony and his incredible 5 base combat exists though, that dream is a reality. Daring and Momentum both help as well, meaning that if you really want to go wild, you can throw in an All In to the test and get tons of cards out of the deal as well.
With those investigators and cards being printed, I don't think it's entirely surprising that Double or Nothing got nerfed on the optional Taboo list. Even without those cards, I've always felt like it was pretty good just because of its combo with Quick Thinking and "Watch this!", but now you can do far more than gain 2 actions and net 9 resources with the card. Even at 3 XP, I think the card is definitely worth considering in the right decks.