I don't know how left behind people will be. Lots of players haven't bought the JTL expansion for Star Wars, and it doesn't really effect them much.
The other part of your argument is plain retarded. That's like telling the makers of the SIMS game that they should have had all the stuff from their countless expansions in the game from the begining....
Players want expansions. They want the game to evolve and they don't mind paying for it. It's better than having the game go stale. Jump To Lightspeed for SWG came out recently, it kicks ass, and players are still wondering what the next expansion will be. (more planets I hope)
If these game companies put all this stuff in at the begening, the games would never finish and be released. It's simply not possible. Try to imagine all the people and money SOE threw at EQ2.
Of course a large part of this is for SOE to continue making money off the game's expansions. That's just good business.
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http://www.oceas.com/SpreadFireFox
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He cut the possum's face off then cut around the eye socket. In the center of the belt buckle, where the possum's eye would be, he has placed a small piece of wood from his old '52 Ford's home made railroad tie bumper. Damn, he misses that truck.