I am thinking of cancelling as well, but the 1 month of PS+ is still a bonus, and this is still a good price for this game. The trouble is, my ridiculous backlog. I won't get to this game for months, and I don't mind buying used, so I'm sure I will get a better deal.
Anyone get any info about their free month of PS+ yet? I also have a ship date, but still no mention of it.