Movies go along at 24 fps and there's a lot of blurring even when stuff isn't moving all that fast and that's the only reason you don't really notice how low the framerate is.
I think your animation has a decent frame rate. I don't think it needs that much blurring, it looks a little bit "overcompensated".
I'm not saying that you should remove it, I don't think it'll really be all that noticeable in-game (the character seems to be an NPC, right?).
I'm just saying that I don't personally like blurring when the motion is slow. I know you're going for a more natural result, but what I see is totally the opposite. It's like my eyes can isolate every single frame and spot the blurriness, instead of reading the movement as natural.
Maybe this is one of these hate/love things where you'll find a wide range of opinions.