Greg "Ghostcrawler" Street has posted two similar threads in the damage dealing forum on the O-Boards regarding warlock and hunter arena issues. He's asking the community to summarize as concisely as possible what needs to be changed for each class in arena.
You don't have to play a lock/hunter to post here. But I am only interested in a discussion of mechanics, problems, ideas and solutions.
While there are obviously no concrete changes yet, this means that the dev team is looking to improve (or at least change) how these classes perform in arena. You can read the warlock thread here and the hunter thread here.