Honestly I would much rather buy spare pouches than expend a feat, especially if I'm not a human. I suppose that a lot of the feats available to casters in core at first level aren't the greatest (Spell Penetration, Spell Focus, Spell Mastery), but you could always play the long game and get a metamagic feat. If I was running a game where I was super tactical and had all my enemies try to sunder the caster's pouch, I would be more hesitant to buff the feat, but currently most of my players prefer a casual, easy going game, so I don't have such considerations.