Remathilis
Legend
First, CaGI need not be visible within the narrative, or "I know this trick". It can be declared and adjudicated as purely metagame.
Second, in effect what you're saying here is that you object to non-spellcasters having fiat, given you object to any fiat that is not explained, ingame, as magic. That's fair enough, but the whole premise of @Obryn's OP is to explore different ways of giving the fighter player fiat.
Why? It's pretty much of the essence of metagame abilities that what is good for the goose is not necessarily good for the gander.
Here is my problem with many of the "martial dailies" concepts.
Fighter Bob has an ability, We'll call it Sweeping Blow. Basically, the fighter can attack in a burst multiple foes 1/encounter. (F3 btw).
So once per encounter, a fighter can hit everyone around him. Why? What does he do to strike everyone around him? How does it work? Where did he learn to do this? Why can he only do it once per encounter? Why can't he make the same sweeping attack again? What happens if he tries to do it again? Why do his foes "wise up" to THAT trick but can be Tide of Ironed all around the room if the fighter chooses? What happens if his other fighter buddy wants to try it too?
If Sweeping Strike is a twist of luck, than theoretically it can be done anytime the circumstances are right. If its training, then the fighter should be able to replicate it (since he can Tide of Iron or Spinning Sweep all day if he wants). There is no reason a fighter should be able to pull off such a tactic once, even if the circumstances round to round didn't change (all foes still standing in their original place relevant to the fighter, it makes sense he could Sweeping Blow again the next round. After all, its basically Whirlwind Attack 4e, and that feat (crappy as it was) was usable round after round if the fighter was still surrounded.
Which brings me to my issue with metaplot cards being PC only. Dominate Spells don't just work on NPCs. Vorpral swords work just as well on fighters as they do on dragons. PCs have no immunity to these effects, why should they against a fighter's CAGI power?
Let me set up a scenario: An adventuring group (a fighter, rogue, cleric, wizard, and ranger) are wandering a dungeon and find an evil altar. The fighter, a brave dumbass, touches the altar and the DM tells him (via secret note) he is now a CE worshipper of Vecna and at the first opportunity, he must kill his allies. He's still a player at this moment, and he's not dominated (he has full control of his abilities) so the first thing he does is stand 10ft behind his friends and activates CAGI. What happens?