User blog comment:GreenMoriyama/Sauna, the Yordle-Brawler/@comment-24385282-20151221031429

Without any reason to hold onto or build up Fury - she gains no passive bonuses from it and does not require a set amount of it to cast any abilities - I think her costs should be higher but her expenditure bonuses should be smaller. Not only would this provide bigger damage/shielding bonuses onher basic abilities for stacking up greater amounts of Fury, but it would also mean that not doing so would grant smaller bonuses and seem wasteful. It gives players more of a reason to manage Fury on her and get better rewards for doing so well (think Tryndamere players having to balance the crit chance from their innate with the healing amount from their Q).