So here is my feedback:
Compared to an existing server, how is the performance?
I found no difference at least not in the areas I tested.
Any specific areas or planets where you feel the performance has lessened?
Factoring in that I connected from the far side of the world (Central Europe) the performance was nominal with a 300-600ms lag.
What region/country do you reside in?
Central Europe/Germany
Provide a comparison of ping from existing servers to Shae Vizla.
Usually I have 60-80ms server lag. Connecting to the APAC region I had a server lag of 300-600ms.
Is grouped content working properly?
I never play group content. I have a disability that hinders me playing with "normal" players as I can't keep up with them speed-wise and I mostly get vote-kicked after 5 minutes into an FP or OP.
How quickly can you get into a match or Flashpoint you’ve accepted?
Didn't test it.
Is travel to any location (planet, Stronghold, Fleet, etc…) hindered?
Travel seemed to be fully OK.
Are there any issues with the UI such as missing assets or loss of functionality?
I did a complete "100k conquest points" run and didn't miss anything.
Are there any issues with visuals or sounds with the cinematics?
I had a very minor glitch where the hands of my cyborg weren't shown as intended but as bare hands. Once I moved a tiny bit the expected appearance was restored.
So far I only tested solo content and there was no difference to a normal server. Everything seemed to be OK.