Balancing
The changes are already decided on, you won’t be able to change their minds between now and Dec 13th.
That said, you should explain why you made this, as you clearly feel that some of the balance changes incoming are bad. Pick out the ones you think are bad, and explain why. Otherwise ANet won’t even look twice at your complaint. You need to make a case if you want something changed
So far the only balance changes ANet has announced are exclusive to PvP, as they are beginning to split some functionality between PvP and PvE. As of yet we have no idea what, if any, balance changes will be made for PvE. As Gaile herself has made a thread in the PvP forum detailing the changes being made there, if you have any concerns I recommend bringing them up on that thread.
Yak’s Bend Server
Crimethink [ct]
Actually, some of the balance changes in that post are global, and not PvP-only. Each change lists whether it is for PvP-only, or for the entire game.
Good luck.