Some of the bugs with werebear mana costs are actually positive - like the nodes that refund the cost of a skill on crit actually give the original cost back, so if you spend 2 mana on swipe you can get 3 back.
But others not so much. I have 5 points in Food for Thought and I am wearing Kermodes. This should be a mana efficiency of 1.25/1.25 = 1. So swipe should still cost 3 but it costs 4 instead. This subtle difference renders Kermodes unusable without the Ursine Wisdom node. Which I dont want to use because then endurance is largely useless and you cant take advantage of the awesome Berserker passive. Plus the whole point of Kermodes is to enable you to stay in werebear longer with the mana on kill. Im bummed, i spent a while gambling for Kermodes and this bug makes me not want to play this character anymore until it gets fixed 