Only accept it as-is if you will be happy long term, which is a personal decision. You don't want have regrets every time you use pool just for an easy way out now. Ask the PB if you can visit some pools with a ledge and see what depth feels right. Ours is 1' below the coping, making it about 8" deep depending on water level. Works for us. Any deeper and you will probably want a step down to the ledge. Glad the PB is working with you.