I think that putting a new pool it would wise to include the valve. We have had a hot 90s and low humid 35 in Michigan we have been adding an inch daily. My brother has an automatic refill valve in AZ. Don’t know if that’ helps for Florida since the humidity is always high.

Yes - get the auto fill.... it’s nice to not have to drag a hose around the pool deck.

Yes a pool autofill/ drain is a must saves a lot of headache when it rains or evaporates. Make sure it is installed correctly and works correctly. Splashtime installed ours and it never worked correctly and refused to fix it. After dozens of emails and phone calls they refused to fix it. I ended up fixing it myself with a $3 part. That's why I will never use a discount pool company again .