When we were last there in February 2017, Phase 3 had only been open about 6 months or so. Unconfirmed reports had said that there were supposed to be some of the larger 1KP units somewhere in buildings 23 to 25, but from the parking lot side of the exterior or fire-escape floor plan we could not really figure it out. Good to know they do exist on the back of the buildings facing the golf course.
In phase 1, all units face the golf course, since all units only face out the back of the buildings (assuming the parking lot side is the"front"), whereas in Phases 2 and 3, the units have a centre hall and face both the parking lot and the golf course. We deliberately picked the smaller 1-bdrm unit since we were staying for a full 2-weeks and didn't want to spend the extra points for the larger 1-bdrm. As a compromise, we did opt to use 12,400 points to get a 1BP "plus" unit so we would not be right on the ground floor. We were pleasantly surprised to get a top-floor end-unit and, as we and others have previously said, really enjoyed it.
The smaller 1-bdrm unit itself is smaller than we typically get at HGVC and the lanai is also much smaller than the larger 1-bdrm, but it was OK for just the two of us. It would be a bit tight for a family of four, especially when using the sofabed, IMO. The third-floor view was actually nice and also better for "people-watching" than on the golf-course side. With the partial golf course view across the road we did get to see one of the local donkey herds cavorting on the greens a couple of times! In some ways we preferred our view to the "official" golf course view. Having stayed previously in a 2-bdrm facing the golf course at Bay Club, the golf course view tends to be pretty dark and "inactive" at night, which can be both a minus and a plus, IMO.
As klpca and giowop have mentioned, the pool between buildings 24 and 25 is very nice and IMO the second nicest (and largest) of all the other pools at Kings' Land. We really liked it and used it most days, only going to the main pool when we wanted to use the food facility or needed a change. As SmithOP has already confirmed, it does have a hot tub, too. I have photos from 2017 on one of my SD cards, but we are currently in St. Martin and I don't have those memory cards with me, so can't download them for you.
The main pool is fabulous and it is definitely convenient for the clubhouse bar and grill. The large pool complex is amazing and the separate kid and adult pool areas are very nice, but it can get quite busy at times. However, we found the pleasant walk or quick cart ride to the main clubhouse was really not a big deal. Anyway, it looks like you have been able to confirm that you are getting the larger 1-bdrm and the only downer being the distance from the clubhouse if you want to go to the main pool complex every day. It will still be a really nice vacation. We really love the Big Island. Enjoy your stay!