An idea I've been tossing around (spurred primarily by the Antagonize feat's Intimidate function, and its mundane, at-will compulsion effect that doesn't count as a compulsion effect for resistances) and furthered by my wish for something like that to exist, (and more nice things, possibly like that, for fighters etc. in UC) but not be broken, is to offer a saving throw for them (Will, or maybe just a Wisdom check) that works a bit differently. Not quite a standard save, but not a combat maneuver.
So for, say, antagonize, in addition to the intimidate check, it offers a saving throw.
DC = 10 + B.A.B. + CHA
This makes it something that is clearly better for martial types, while not being overpowered for, say, Intimidate-focused Half-orc Inquisitors. One could argue that this makes it too good for Paladins. Maybe so, but they'd have to spend a trait on getting intimidate as a class skill, and high-Charisma martial types, including, say, fighters, were made somewhat viable by eldritch heritage anyway.
The only other thing I can think of that makes sense flavorfully is if it were a CON-based DC, and there is no precedent for CON-based DCs, aside from certain monster abilities, and then, barbarians who have the rage power to add STR to intimidate and take this feat are significantly better mechanically than anyone else who could (though, them being more adept at provoking enemies into seeing them as a big threat makes sense flavorfully.)
Gonna go ahead and bump this and ask for feedback. Maybe it'll be seen this time, because it dropped of page one REALLY fast earlier...