This is perfect just the way it is. Sure, waiting in queue sucks, but common... would you rather fight over every mob with thousands of people. Not to mention lag. Server would be crashing every 10 minutes if server cap is increased to 4-5k.
You are forgetting that this isn't Nostalrius, those guys had their own problems when they lunched their first server. Not even Blizzard it self couldn't handle Vanilla community in the beginning. Game was crashing for the first 8-10 months all the time.
Therefore sit down and relax. Wait for the queue like everybody else, when your time comes enjoy the game as much as you can.