That said, feats like Goad and Antagonize (on the PF side) are still controversial because of their potential to overrule player control of his PC without the intervention of magic. Nearly as controversial as CaGI, in fact. So it's not just that CaGI was an unexpected big deal. Goad and similar feats simply are a big deal.
Emphasis added. If we want to add more options to non-magic using characters, then we need to accept that moe things can be accomplished without the use of magic. The player has lost control of his PC to a Taunt spell or to a Goad/Antagonize feat. Tough luck - the PC can't simply choose to control his emotions because the player, or the PC, wants him to. If I want my character to be a potent melee monster, I invest charater resources in STR, CON, high BAB class levels and/or combat feats. If I want him to be a great judge of character, I invest character resources to enhance my Sense Motive skill. If I want my character to be centred, in control of his emotions and difficult to Charm or Goad, then I invest character resources in a high WIS, high Will save class levels and/or feats like Iron Will. Not deciding by player fiat that my character is difficult/impossible to influence or manipulate.
I don't get to decide I'm a powerful fighter, or that Im slippery and agile (so I evade Fireballs, for example). I invest character resources to maximize my ability in those areas most relevant to my vision of my character. And I have to trade off - he can't be good at everything, and if he wants to be "the best there is" in one area, he's not going to be that great in other areas. Resisting social manipulation is just one more area where I have to decide the extent of character resources I'm prepared to invest, no different from any other choice of where to invest my scarce character resources.