I haven't gotten the packet yet, but I checked online, and mine went up 12.5%. Honestly, its not terrible. I think its a tough time to raise prices, but they have been paying a LOT for this product, so I am not surprised. This also may be the last time they can afford to raise prices for a while, since the team is likely to be in decline very soon.
Ultimately, I am still happy enough (well, as happy as I could be to throw out that kind of money) with the ticket prices, relatively speaking, since they are still significantly cheaper than buying single-game tickets.