Context of what you are seeking in a poll is very important. In this case, the poll seeks to acquire a stable statistical view of what subscribers crave in the way of future content.
A better way to do that would be for Bioware to send out a poll to a group of subscribers that closely matches the actual break down of players.
There is nothing in evidence that shows that the people who come to this forum are a close break down of the opinions of the general game playing populace. In fact we know they don't represent the opinions of people who played the game as more people have quit the game then are still subscribers.