Better launch a good site with less flaws rather than launch it in a hurry, where they will just get a lot of complaints. Hopefully, the testers will find some bugs that will improve their performance.
I agree with you it's much more better to open late rather than to hurry and lead to a lot of complications and problems with the site it seems they're doing their best to open it as soon as possible but we can't blame them if they may delay it a little bit. I hope they have some good promotions on their launch, looking forward on playing on your website.