I do think you should consider buying the annual pass. Last summer I bought one and we made great savings between POFQ and WL. Of course this year's rates are different, the AP is dearer and there's no guarantee of discounts but I can't see why Disney wouldn't give AP discounts for time of year again.
These are the savings we made at POFQ (please note these are all last year's figures):
June 24th to 29th - rack rate 166 incl tax per night x 5 nights = 830
We paid 121.50 per night incl tax = 607.50, saving 222.50 in 5 nights.
Had we stayed for 11 nights as you are we would have saved 11 x 44.40 (nightly discount) = 488.40 MINUS the EXTRA cost of the annual pass (at last year's rates) which was 200 we would have saved 288.50 (we actually saved a lot more because we got 100 per night off at WL but I must admit I wouldn't have even considered staying at a deluxe resort if it wasn't for the annual pass so having the pass kind of upped my plans a bit.

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11 nights is a long stay (good for you!!) so I am sure you will make a lot of savings on the Disney Dining Card too. Our trip was the same length as yours and we had 10 sit down meals as well as 3 eligible counter service meals and we saved approx. 200 dollars minus the cost of the card, at that time (50) so we saved 150 dollars. So at last year's rates, overall you would have saved 438.50 staying at POFQ for 11 nights.
Oh but we did shopping too at World of Disney and saved 5%.
I'm shocked at the price of the Annual pass this year though. 575 is so expensive compared to last year - I paid 395 plus tax coming out at around 444.
And if we're being TOTALLY realistic, the savings I quoted for 11 nights at POFQ (or POR) of 288.50 could be compared to AAA rates (if available) instead of rack rate which brings your discount down significantly. From what I recall AAA discount was 15% last year.
Good luck in your decision.