We have stayed at all of the deluxes except GF, and we totally love all of them. However, last month we tried a moderate (POR) and also loved that one! Let me tell you the main differences we noticed between the moderate and the deluxes. First, the beds are smaller at the moderates -- they are "doubles"! Yikes! Next, no balconies at POR, not sure how the other moderates are. Next, the moderates are pretty spread out and when you walk out of your room, you are outside (no inside corridors). Those were about the biggest differences for us, besides the fact that the moderates had bus-only service (no monorail or walking paths to parks), but you got used to that at AKL.
Now, having given you the sort of "negative" differences, let me tell you that we wouldn't hesitate to stay at POR or another moderate again in the future. We LOVED having a large food court, which the deluxes don't have. So that is a plus for the moderates. Of course, another big plus is the cost. It's nice to save money on the room, but yet the resort is beautiful with good food, so we really felt like we made out pretty good.