Don't even think twice about the heat pump. Do it. I had pools in MI and GA - both had heaters, and I initially thought I might not need one here. The screen knocks down way more sun than you think - both for UV rays and heating effect. I have a 144K heat pump on my small pool, and it works great. With the screen here in FL, my pool never goes above 90 and is almost always between 87-89 during the summer.
I like the pool at 88 most of the time, and the heater gives me that during the colder months of the year. In December, it runs less than an hour a day - in Jan and Feb it runs anywhere from 1-3 hours and keeps the pool at 88.
I agree with the other posts on filters - get the biggest you can fit. My pool is only 6,750 gallons. I have 200sf filter and still need to clean it every two months. If I had the 450sf filter, it would only be twice a year.
I would not have a 3' shallow end. You'll regret it within a year. My pool goes from 4' to 5' - we wanted to just do 5', but code doesn't allow it. We wish we had done 4' to 6' now.
The one big thing I would change for anybody that doesn't have a true deep end is to install a channel drain instead of two main drains. The standard drains stick up quite a bit, and when the pool is only 5' or 6' deep, folks hit their feet on them all the time. It also causes an issue with most cleaning robots. If I ever build another pool, it will have a channel drain.
I don't see automation listed - I would consider it. It allows you to truly use your VS pump to save money.