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Blizzard has opened three new servers and whenthey were opened my server lost MANY alliance and horde that we had already had few of blizzard should combine low pop servers that have the same problems as mine with low pop alliance high pop horde but still we are marked low pop.
what do you think?

Until you consistently have servers with below 1500 total concurrent population at peak for that server Blizzard won't even think about any merger. Creating a queued server is something they will want to avoid...

Currently no server has population that low, even though Horde population on some servers is very low even at prime time.

What Blizzard will do is charge you a nice li'l sum to transfer to another server, allows them to get more of your money as well as saying they do have a solution in place. Since the customers clearly will put up with just about anything to play the game judging from the continued growth in subscriptions I very much doubt they will put much effort into low population server issues soon.