I have a hit talent (3%). The one I'm missing (additional 3%) is on the second tier of the Frost tree, which means I have to spec 5 points into a school of magic I rarely use just to get access to it.
Specifically:
3/3 Ice Floes benefits only Ice Block, Frost Nova, and Cone of Cold. That's less than 1% of my DPS, 1% of my CC, and a 10 second immunity on a 5 minute cooldown (4 min talented). Utility talents are bad right?
2/3 Frostbite, again, only benefits the Frost school, which is less than 1% of my DPS (Cone of Cold, extremely situational).
That's assuming I don't do something stupid like put all 5 points in Improved Frostbolt.
I have about a 6-7% miss rate on boss level targets right now. I should be able to close that gap with gear, not talents. I'm getting there, but dropping bosses (even in 5 man content) is holding me back right now for various reasons.