New Beek here as well, but I didn't get my nucs until the end of June. I have two hives that have not drawn out the end frames in both the upper/lower brood chambers and maybe one or two others in the top brood chamber are not drawn out either. I'm not overly worried going into winter this way, its my understanding that the bees are always apprehensive about filling out those end frames anyways. I did manipulate my frames during the summer when possible to force them to drawn out all the frames. The weather is starting to change here (Ottawa, Ontario), cooler nites and only mid 20's during the daytime. I did notice yesterday, that the bees are getting pollen from somewhere, lots of it on their legs. I started to feed 2:1 as well yesterday, noticed a couple of frames in my buddies hives that were completely empty of honey ... so maybe things are drying up for the season. The bees will backfill those frames in no time I suspect. Just my own observations as a first season beek.