Dude, it's not realistic movements. I think it's just not optimized or done correctly. You can have realistic movements without the control problems. Furthermore, "realistic" slow movements are for humans not Witchers.
Also, realistic is when Geralt shouldn't be running around in circles just to pin point an item. Hopefully the next patch will fix some of these problems with the controls. It's just a matter of time.
ABOUT GERALT IN GAME:
The game should make it easy to do everything with ease and fluidity. Geralt should have faster responsive movements, not to mention he's suppose to have speed and agility. Having Geralt move like regular people is unrealistic, boring and tedious. I see Geralt as a monster with speed and agility like a wolf. But in the game, he acts realistically like a regular human. Nothing like how he is in the trailers. I wish they make Geralt less of a human in terms of movement and speed at least. He moves and fight exactly like a human (but slower than bruce lee). When I see Geralt, I would imagine him being able to jump atop a building or at least have a better jumping height/speed than a regular human. I think it will be a lot of fun if Geralt is portrayed like that in the game where he can move anywhere with ease, like in Batman games. Batman is way faster than Geralt in the games, and Batman is human. Man if they make Geralt more like the books/trailers (or even half the strength), it would make exploring so much better.
Geralt should be a badass and it should be easy for him to dispose one or two guys without armor. You can have Geralt fight like a badass but still make the game hard in other ways. I don't think Geralt should have a hard time beating humans. It should just be the monsters or wild hunt that should give him problems. And we all know that monsters are stronger than humans. So:
MONSTERS > HUMANS
And Geralt is a monster slayer...
GERALT > MONSTERS > HUMANS
Conclusion: Geralt should not move and attack slower than a regular human. The game looks and feels that way.
/rant