I hate to tell you this, but SE is no different from just about every other MMO maker out there when it comes to player feedback during the closed beta. Yes, they do read what you send them. Most of the time, they fail to do what the players suggest.
Blizzard added the Paladin's talent trees in a final version less than 2 weeks from WoW's launch. So, they got no feedback that they could really use to make changes to the tree, because nobody had enough time to test everything, give feedback, and give Blizzard time to make changes. The player base was fairly vocal about not releasing it until the testing was done on the new tree. Blizzard released anyways, and the Paladin was a poor class at launch.
NCSoftt was told by the CoH closed beta player base that the instances for questing were just too repititious for long-term play during the closed beta. They released the game as it was, and after a few months, players left in droves for either EQ2 or WoW. When CoV came out, they CONTIUNED the same mistake. They knew better.
Look at SOE's famous SWG NGE fiasco. 'Nuff said. The only credit I give SOE is that they admit they made a horrible mistake. And they have listened to the player base of EQ2 a whole lot, and the game continues to improve. (Though my necro still needs a little more love, damnit! hehehe)
Most companies making a MMO are like that DM in D&D that came up with what he thought was this incredible scenario/dungeon he wanted players to go through. He spent all these hours making it challenging, interesting, and what he thought was fun. Then, the players try to wander in a different direction, and the DM is furious because he didn't PLAN for that. Why would anyone want to go THERE when he spent all this time creating this wonderful setting right HERE! That, in a nutshell, is the creative director behind just about every single MMO made. Little despots with bad cases of game-designer megalomania. THEY KNOW BETTER! The players just need time to adjust to their brilliant ideas.
We've seen it with Vanguard: Saga of Heroes. We saw it with that Richard Garriott futuristic shooter MMO. We're seeing it with FFXIV. We saw it with APB, which just went belly-up. We saw it with Hellgate: London. And we'll see it with several upcoming games.
Blizzard didn't invent the wheel with WoW. They refined a lot of existing things, made a game with a very low hardware requirement, and removed a good portion of the "Evercamp" factor. That's why they are the 11+ million player goliath they are.