I'm going to be playing a barbarian in a Pathfinder Legacy of Fire game, and I was thinking of taking the Gnoll Killer campaign trait.
You gain a +1 trait bonus on attack rolls and weapon damage rolls made against gnolls. If you are a barbarian and you’re fighting gnolls, your rage lasts 1 round longer than normal. If you’re a ranger and you select humanoid (gnoll) as a favored enemy, your trait bonus on attack rolls and weapon damage rolls against gnolls increases to +2. If you’re a spellcaster, you gain a +1 trait bonus to spell save DCs for damaging spells against gnolls.
I'd like to focus on the bolded line. I know that in 3.5 you had X fits of rage per day that would last for Y rounds, so with this trait your rage would last Y+1 rounds when fighting gnolls.
I was thinking of something like getting one round of rage for free when fighting gnolls, provided you still have rage left when you start raging.Thoughts? Is this along the power of the trait as it works in 3.5? If not, what would you do differently?