Hey, I was thinking of your thread the other day, and can't believe I missed your updates. I noticed the collection of tree roots in your excavation pics, did you have a tree removed from the pool pit? Those were some thick roots that were pulled. They remind me of the longleaf pine lateral roots I've dug up after removing some large pines that were left too close to the house. Stupid tree roots!
Everything looks ok from what I can tell. The main thing with the rebar cage is that the gunite crew shoots the gunite to where the cage sets in as dead-center of the shell as possible. The cage is what provides the pool with its tensile strength.
Another recommendation on double checking all of your measurements. You'll be very unhappy if your waterline measurement is off, this can be measured now from the skimmer down to the bottom of the excavation pit. Also double check your shallow end measurements, light niche location, etc. Check everything now that cannot be reversed post gunite. Sometimes, things are misinterpreted during excavation, and now is pretty close to the last moment to double check everything.
Another thing to double check is the measurements/distances of your screen enclosure footings once they are poured. This is another area where a single mistake can potentially cost you and the builder a lot of frustration and headaches. I know this is far away from now, but also make sure your super gutter or extruded gutter for the enclosure is NOT SEAMED on the straight run! This will save you frustration several years down the road. Several people I know, and some customers of mine (I work for a building supplier that also sells pool enclosure materials, among lumber, concrete, roofing, etc.) complain to me of this on a fairly common basis.