Completely from a make you feel better perspective, it is a liner pool, so cracks don’t even really matter that much so long as it’s not so compromised that the walls would push out of place. I can’t imagine that is any issue whatsoever. I also don’t think it is compromised to any degree. It certainly seems like just normal surface cracking on concrete.
Regarding your skimmers, you’ll just manage the water flow by the eyeball fittings on the returns to best stimulate the water to flow towards the skimmers. This will take some time to perfect. One trick is to put a bunch of ping pong balls in pool and watch them flow around. Adjust one return at a time and you will eventually achieve your best possible skimming effect with your setup. Again, give it no concern as it’s done and you can’t do anything about the skimmer locations. It will be fine. Most people don’t have to skim their pools with any regularity. My wife likes to get the random things on the water surface, but that’s mostly just to give her a break from reading her book and it allows her to walk around a bit. She never goes to the pool to do this otherwise, and it always has a clear surface. Those random things on the water she is getting would be gone an hour later had she not skimmed. You will though want a robot to clean the pool bottom and provide some brushing effects. Try to get the PB to credit you whatever you can manage for the vacuum system he has included. Then you’ll buy a robot yourself. Allocate $700-$1,000 for that.
Which model of salt generator is specified? Your pool will be pushing 25-30K gallons so you should have the IC-60 which is rated for 60K gallons. You want to go 2X your pool volume in your southern location.
Setting looks fantastic, can’t wait to follow along.
I have a few comments on landscaping choices but that can wait unless you’d like to chat now. It’s regarding the selections for the back of the property.