Whether the 2k is worth it totally depends on whether you will enjoy the holiday as much. We are going next August and could have saved £3000 if not slightly more by going to POR over GF. My parents are doing exactly that, because they love POR and it works for them, therefore the increase in price was not worth it at all. However, we want proximity to parks, better transport options, better dining options, and a deluxe resort so we just would not have the same holiday regardless of how much money we saved. We know we could save a lot, we know there are many, many cheaper options BUT it would spoil us doing the holiday that we want to do if we took them.
I don't think anyone can tell you how you'd feel as only you know that. POFQ is a lovely resort but it lacks amenities compared to a Deluxe. If you like both equally then of course the saving is worth it, but if not then to me it isn't a saving it is a downgrade (and obviously cheaper). I don't mean to sound snobbish at all, but to me it is not a saving per se unless it is like for like (eg Poly or GF, Beach Club or Contemporary - deluve v deluxe) in which case yes I would go for the massively cheaper one.