My 2 cents...If you've got a window to look out of then have your sink on the same bench as your cooktop. If you haven't got a window ie. you'd be looking at a wall (which they say can be a bit isolating), then put it in the island so you can face outwards to see kids?, TV etc while you're at the sink, prepping. If you're concerned about visual mess on the island you could have an area of upstand in front of the sink area.

Does your daughter wash the dishes, or use a dishwasher? If she uses a dish washer, where is that positioned? If you are moving the sink are you moving the dishwasher? If the home is almost at lock up stage, then this change will be expensive. If using a dishwasher more often, I would really have to look at my budget to see whether the extra cost, and time delay really worth it.

Sink in island is ok, depends on how clean you keep it and how you intend on using the island. Kids do homework at the island isn't ideal with water being splashed about.... Corner pantry is ok but everyone of my clients that has had one in the past say they loose too many items hidden in the far corners.... One of my clients has a pantry same location as your builder has drawn except it goes all the way past the appliance cupboard. It uses a sliding door and have the often used appliances directly in front of you as you slide open door. The lesser used appliance located where your appliance cupboard is now. The remaining space is for food storage. Have a chat with kitchen designer, hers was hesitant at first as they'd never seen this before.... now they have used it on other kitchens......

I would do sink on back wall in front of window. Stove on the side wall that has the window. Could do 2 windows either side of stove. With stove on side you can still chat whilst cooking. Tall storage on opposite wall and fridge