Step 1: Make a consolidated list of vanguard issues, oh look : http://www.swtor.com/community/showthread.php?t=190674
Step 2: write one of 3 things about each issue; Working as intended, known issue we are working on, known issue we are not currently working on.
Step 3: Keep it updated
Looking back at the mmo's i have played, i have never left one due to a bug,class :)imbalace, or any other in game issue its always due to lack of transparency.You see i can handle someone saying no to me, but i cannot handle ignorance of a issue, subversion or answers that feel like they came out of a presidential debate.
Doing this will take a little bit of time in the short, but it will save time and subs(atleast mine) in the long run.