Although I understand the negative vibe to some extent, I don't think it is fair. We've become so expecting when it comes to customer service at Tesla that we probably expect too much. Anyone dealing with Tesla knows there will be some major improvements every x time. So, if you're disappointed by the announcement/introduction now, you'll probably always end up getting disappointed at some point in time, if you decide to order a new tesla. Always. There will always be a newer greater and later model. And always sooner than we're traditionally used to.
We were satisfied with the specs when we placed the order. Which is great. Enjoy the great product bought!
That some others (later than you) are able to change to a newer even better offering because they haven't completed their order yet, or haven't taken delivery, well that is just testament to the great flexibility Tesla offers to buyers and amongst the things that set Tesla apart from other manufacturers. We can change our config when not finalized the order, we can change for a small fee if not in production queue, we can cancel an order for a relatively small amount at any time before taking delivery. Not many other manufacturers offer such flexibility.
Now that Tesla doesn't offer a cheaper upgrade path after one has taken delivery, still is much better than any other manufacturer around. Tesla at least offers one! No other manufacturers would even consider to do so. So let's not blame Tesla for its first-in-class flexibility offered or be disappointed if that flexibility didn't go as far as to extend it to virtually everyone. And let's enjoy the car ordered some time in the past.