This card is imho the hidden COTE (Card Of The Expansion xD). There are some other REALLY great cards I love even more, but they are talked about consistently. Meanwhile, this one is extremely overlooked and people don't even try it before they say it sucks. Well, it doesn't. It's good, and I mean REALLY good. It flat out opens a new playstyle for a consistent fighter-evader and excluding some Customizable cards, it may be the most game-changing (or better; game-expanding) card in this expansion.
I've tried it a few times so I'm by no means a master of using this, but it's basically the only card you need for a completely new (viable) playstyle, while completing it with anything that does consistent damage like two handed rifles, knives, akimbo guns... You could've done that before Scarlet Keys with some cards like .25 Automatic, and while it's completely viable (especially the .25 Auto. (2) is incredible), it's still just a limited tactic you can use once, maybe a few times per game with recursion, but this is a talent that sticks and works every time all the time and it's basically just flat +2 AND 1 bonus action per turn. AND you can still use something like .25 Auto for better effect. And yes, the "fight action" keyword is NOT "basic fight action," but ANY "fight action," so you can use weapons and stuff to supplement it. And it's 2 xp, so investigators who dip into Rogue can also take it and use it effectively.
I think that this effect is not niche at all, but EXTREMELY adaptable, since you can use that +2 for ANY attribute; Fight, Brain, Foot - shooting, smacking, arrowing or spellcasting the enemy; as long as you're fighting in one way or another, you get better numbers. I might be overselling it a bit here, time will tell, but as said, I've tried it a few times and so far it's been incredible. If it's the evade & attack playstyle you want, it just became a legit and competitive fighter playstyle. And this card is the main component for mere 4 xp for two copies (Kymani gets 5 xp before the game even starts!).
This card single-handedly makes investigators like Rita, Skids or Wini into competent fighters (Yeeey Skids, it's finally your time to shine! And while not useless before, Rita's also a much better fighter now.), or basically any investigators that can evade and use a competent damage dealing card - like Kymani, Finn, Dexter, Sefina...
Another thing is that this card in the two latest expansions just became highly searchable and readily available with awesome cards like Black Market (it's Illicit), Friends In Low Places, Underworld Market, or even better - Finn’s Smuggled Goods (again, Illicit).
And that’s just the basic effect. There's also parleying, which is fantastic the few times you need it - it always gets on my nerves when I miss a necessary Parley. Also, it's completely stackable and basically anything that gives you more numbers combines with this like .25 Auto or Lonnie, and these two are also simple to use and play. There're also combos with Stealth (3) for a free fight action without the boost, Blur(s) are both great with their action extension, it also does well in an Ornate Bow fighter because of naturally high Foot and many more... And it's not even very expensive, takes one action to play that it even gives you back instantly, while as a Talent it doesn't take any slots and it's quite "resistant" to the Mythos deck. This +2 also combines well with "Succeed by number" playstyle, so you can go for "Succeed by number fighter" now, which was niche before. There're many more things it does and if nothing else, when playing it in Kymani, it's a flat +2 Foot and +1 action every turn.
I really like this card and while I wasn't a fan of a focused evade deck before, the fighter-evader is an interesting prospect to me and I love how this makes some subpar investigators much better, and also opens up some interesting new decks.
EDIT: Some corrections.