Nothing will be different; history will repeat itself, they will make yet another client they the customer base does not want and will not accept, they will release it early; it will be riddles with bugs; they will try to force the players to buy it by having special pre-order gifts that will only be available once, or until they need more cash.
Not quite. The new client is not going to be released early, nor will it be riddled with bugs. We will also not try to force players into using it, nor will we charge for it. There are a host of features (such as the ability to mod the client) that we cannot for technical reasons integrate into the legacy client. However, both clients will work with the game.
Keep in mind that the new client is not another attempt at a 3D client. It's still 2D, but with a slew of new features designed to enhance gameplay.
I hope that answers your questions.
Also, it's not lost on me that this post, being my first on Stratics, is taking place on April Fools day and is completely out of the blue, but I assure you that it's not a prank... I've been visiting the UO Stratics forums and reading for a couple of years now, but as you can see I don't get a lot of time to take part in discussions. However, I hope to be able to spend a little more time for that now and into the future.