I use it all the time. Most of the time, when I encounter bears, I just shout Kyne's Peace at them, because I actually like bears and don't want to kill them unnecessarily. I also used it to explore this cave that was filled with Bears, but I didn't wanted to slaughter them in their own sanctuary. So, I just used Kyne's Peace on them and explored the cave!

It comes in handy in a Spriggan grove, too. I use Kyne's Peace or Animal Allegiance there.
I don't want something that means the "hide" animals don't attack. I LOVES me my leatherworking.... And truthfully, I don't care about peaceful coexistence. If something attacks, I kill it. Whyever wouldn't you?
Well, I guess you wouldn't if you were a pacifist. I'm NEVER a pacifist.
The critters (bears, sabercats, wolves - excluding spiders LOL) usually only attack you, because YOU wandered into THEIR territory. What right do we have to just stroll into a cave, where bears lived for years and just obliterate them? Now, Bandits are another matter... LOL