IMO the movement system is fine (there can be some little thing to smooth it out but for the most is pretty fluid). The only real annoying thing is the soft-lock targeting system in combat that can jump from one target to another sometimes with no rhyme or reason. One moment you are attacking an enemy and all is going fine, but then another one come close to you from the side (or back) and the targeting automatically switches (no matter where you are actually facing) and you then suddenly change direction to attack that target, many times with disastrous effects if this last is in a group. In certain instances it feels like you are a dancer, jumping left and right without clearly either understanding what the hell happened for the direction to change. They should simply tie the targeting to the direction Geralt is facing with no sof-lock changing it depending on closest enemies. In this way you would have always complete and direct control of whom he is attacking instead of many times depending on a casualty (as who is the closest enemy and from which direction it comes from).
Now in vanilla given the huge bonuses in the game even in Death March that's not so much of an issue, but if you use a mod that increases difficulty these things that aren't tied to personal mistakes are quite annoying.
I really hope that, if not in 1.07, they will address this issue as it's one of the only gripes I have with the combat (the other being the way the dodge is designed: either you remove all i-frames or you make all the movement have them, half animation i-frames doesn't make much sense as you cannot most of the times directly control in which side you will end up with).