Iridni, a permanent fear aura on some creatures does not relate to a need to be fear immuned 24 hours a day. Said creatures are not with you 24/7. Fear immunity is not a balance to Fear auras. It nullifies them entirely and takes away the main trait that make these creatures so dangerous in the first place. Where would be the fun and challenge in the game if we take that trait away?
Sure some classes have it easier through spells and innate abilities, but the point of the game is to play through cooperation to overcome your mutual weaknesses.
If those fear DCs were impossibly high I'd agree that it would be required, but my experience is that it isn't so. I see no need to increase the length of clarity potions btw. It would make fear auras as moot as with permanent fear immunity items. Along the many items you can wear to boost your will and fear saves, remove fear and owl wisdom potions will help you resist fear effects further for a decent amount of time. Often the chance of failure will be very low, and rarely will eveyone at once be affected. Don't be shy to use those liquid courage brews we made them for that. (Did I mentionned luck of heroes, iron will and the upcoming Courage feats?)
Yes you run a little more risk than before, it's true, but not by much. What some of you call a nerf, I call a game experience gain.
(Addendum, it's not like those fear immunity bracers were so common to begin with. With or without, most fighters don't have them when going in those dangerous places. Thus proving they were not required so much.)