[Nytingale]

I think stun's fine where it's at, it's in the most balanced position it could be, and there's no need to change that, mechanically it works.

I, like some others, disagree. It is flawed to think being CC'd should be rewarded for any reason; whether that "reward" is to help balance the CC or not. It takes away from the effect itself which; like many others have said, makes one ask the question, "why use it then?". Either rework how the CC functions or make counters to it in the form of Traits, Talents, and Class Skills.

Where is the logic behind getting 50% damage reduction from being stunned? Is that just purely a matter of balance or does that somehow make sense IC'ly?

The former. The thing is, is that there are so many better ways it could've been handled than this way.