From looking at the problems with this game, across all platforms, I'm so glad I didn't pre-order this, despite initially looking forward to it.
I loved Fallout 3, and I persevered with it in spite of all the bugs, freezes and crashes on the PS3 version. But I'm not about to go through all that hassle again, so you won't be getting my money for this game until such time as I read that you've properly patched it. Which I'm guessing, based on Fallout 3, will be never.
I'm sorry, but this is just unacceptable. As capeo has said, you didn't have to start from scratch, and you've had two years to resolve the numerous issues with the Fallout 3 game engine. I'm not sure what to put it down to, but I can only assume you're either incompetent, or you don't care about the quality of the product you're putting out. I can't see why else you would release a product that is so obviously unfinished.
Is this
really a product you feel you can be proud of?