The cause of mouse stuttering when pressing keys has been 100% found

If they even care at this point. 

We have heard nothing from them since the Dec15 patch they released.

I personally think they don't care and wont acknowledge they messed something up so fundamental to the core working of the game. 

There are so many bugs that are causing stuttering that what we are experiencing are just one of the stutter bugs.  Another example is that whenever the game pushes a message across the screen my game stutters.