Hello @Arminius welcome to the community.
To start as your are clearly aware this is still alpha this is in fact the very first public build of the combat system, So some hiccups should be expected as optimizations have yet to be made (speed, fluidity, final touches).
One thing that is worth noting and you should consider is that the 0.4 update has some optimization issues that cause low FPS (damned butterflies!(there was some issue caused by particle effects)), even on some of the best rigs that its been tested on with the settings adjusted accordingly 35 - 40FPS was the best results people have been getting.
The low FPS can make the animations seem choppy or in some cases non-responsive.
How immersive or not immersive something will be is a subjective opinion, and is something that’s best addressed personally.
Did you play the BF3 public beta? it was horrid mess at times. If you compare the KC:D alpha to many other games alpha or betas you would see how much work the WH team has put into this.
0.5 update is soon upon us so we will see whats been brewing behind closed doors for the last 2-3 months now.