As an experiment if you're experiencing stuttering that has gotten worse in 1.3 try disabling the shader warming.
You can disable the shader caching on startup by editing your AppConfigLocal.xml file:
<PlanetNoiseTextures
ShaderWarmingEnabled="0"
/>
Does that make any difference?
Michael
Really appreciate you chiming in Micheal, will give this a test tonight when I can log in. Side note: disabling the shader cache in Nvidia control panel and having the game cache the shaders made no difference so eager to try it the other way around.