I've noticed over the past few days some of our users (and users in general) have been having problems with lag, and the DX9 fix seems to be solving it for a good chunk of them, so I thought I'd post this before open beta. What this will do is force your game to run in DX9 mode, thus increasing performence - don't worry, it's super simple to do!
DIRECT X 9 MODE
1. Find your WildStar shortcut
2. Right click --> Properties
You should see a text box titled "Target," with something like "C:\Program Files (x86)\NCSOFT\WildStar\Wildstar.exe"next to it.
What you want to do is write in -DX9 after this (with a single space)
It should now look like "C:\Program Files (x86)\NCSOFT\WildStar\Wildstar.exe" -DX9
Hit okay, then run the game. If the fix worked, great!~ If not, simply go through the steps again, only this time deleting -DX9 instead of adding it.
hopefully this helps some of you out with the lag.