If you think you'll be able to order in the initial release that means you must have reserved early. Which means you've already been waiting for over a year. What's a few more months? From what has been tweeted it sounds like there is every chance that AWD would be available by the end of the year, and I'd assume, if it isn't there initially, that the larger batter would be as well.
On the other hand, if you waited in line and you're in CA, you're likely in front of me (I waited in line but am in Ohio) - so go ahead and cancel.