NOTICE: I have "halted" the mod for further investigation, whether it's a classic case of placebo or whatever it is. I can't seem to get consistent results when testing. The file available for download now actually does a little less than the description below promises but I think it's easier to move around in awkward terrain with these tweaks so until I can figure out the bugs in the files I removed, it will remain the only available option. It's mainly tweaks regarding Geralt in this version.

UPDATED2: Choose between default values or my tweaked values. Response time minimized further.

UPDATED: Horse races are now FIXED! Thanks for the heads up, guys.

Improved mounted and unmounted movement response which makes it much easier to navigate the horse in narrow passages, for example. The way it works is quite simple, like shown in this example;

Movement speeds;
walkSpeedAbs="2.0" slowRunSpeedAbs="5.38" fastRunSpeedAbs="5.38" sprintSpeedAbs="6.66"
Button dampening;
walkSpeedRel="0.6" slowRunSpeedRel="0.99" fastRunSpeedRel="1.0" sprintSpeedRel="1.5"

Response time for sprint then becomes 6.66*1.5=9.99
Whether that's milliseconds or whatever is uncertain, but the lower that number is, the more responsive the character gets to keyboard/controller input. I have reduced them to 0.1 which makes Geralt and Roach stop and turn quicker which makes it easier to control. I guess you could call this dampening a "poor man's inertia" but it clearly didn't work as intended. I prefer it this way.

With this mod, the response time would be this;
Response time for sprint then becomes 6.66*0.1=0.666

Tweaked Movement Version
Actual tweaks:
- Nearly removed "button release dampening" both mounted and unmounted which affects response time considerably.
- Reduced unmounted running and sprinting speeds marginally for all humans (not just Geralt). *
- Increased unmounted walking speed a little bit
- Reduced mounted running and sprinting speeds, the latter marginally. *
- Wolves sprint speed increased to faster than a horse, which is realistic. **

* The main reason for reducing speeds were to reduce jerky movement. New speeds are measured from Geralts new walking speed, where he now sprints 100 walking paces (~100 meters) in 12.5 seconds. Not too shabby while being armed to the teeth if you ask me. The old sprint speed were about a second faster. Horse speeds are calculated from the new sprint speeds, converted to km/h and then back to the new horse sprint. A horse can gallop 40 to 48 km/h whereas Usain Bolt can run ~44 km/h (for a much shorter period of time).

** They do not seem to sprint very often, though.

Default Movement Version
- Nearly removed "button release dampening" both mounted and unmounted which affects response time considerably.


PS. This mod might go well with a mod that reduces stamina cost for Geralt's sprinting but it's not a necessity.

Install/uninstall:
Extract to "...The Witcher 3 Wild Hunt\content\content0\bundles"
Run install or uninstall batch file from there.


Credits:
CDPR - For the game
Creator of quickbms - For the nice tool
Ronnie James Dio - For inspirational music
The Nexus - For having a simple yet effective mod site that even I understand