Help with a layout please

[123Holly]

The large side room at the moment is a big messy playroom. The kids don’t play overly much in there as they prefer to be in the main living room with us.
I’d like to open up the kitchen/breakfast/large lounge to create a nice big family area with sofa and TV. I can see us spending most of the time in there and I love the idea of having big family get togethers in there.
DH likes more walls. He wants to knock down the wall at the breakfast area but rebuild it in line with the utility room wall so we would have a long kitchen/breakfast/family area, with a separate kids room.
Managed to find the floorplan from when we bought. Please note that from the main dining room there is a doorway into the kitchen which is not shown.
Help please!

Knock the sitting, utility and kitchen into one.
Turn what is the existing kitchen into a big utility where you hide the dishwasher, washing up boiler washer drier laundry all things that need to be hidden.
You could add a corridor along it or do away with the downstairs loo and split the kitchen into a utility and shower room
Do you use the dining room? Would it be better as a study or knocked into living room?

I think DH is going to be changing jobs soon so the dining room will become an office space I think.
I was hoping to put a door into the garage as well for easy access, as now we have to go out front only at the moment.

I agree, breakfast room, utility and sitting room becomes the big open plan space. I would move back the wall slightly of the existing kitchen to extend the hall slightly so you can incorporate a door way into the new room and also a doorway from the hall to the study (current dining room). The slightly narrower kitchen becomes a utility room accessed from a doorway between it and the new kitchen.

What about moving the kitchen to the current dining room and knocking down that wall? Meaning the full back of the house would be a massive open plan kitchen, massive dining table and a family tv area. Could then put some bifold doors along the back?