This is nothing compared to the congestion that happened when ToAU came out. Took a week for them to get everything right. A single day is nothing new when it comes to an expansion.
Still... it is annoying.
There is no need for a petition or anything like that. Give it a day and it will pass. You will look back at this and hardly remember it. I hardly do with the other expansions. If you want something to complain about, there are more pressing matters like balance and gameplay that need addressing or are more petition worthy.