Kitchen size would dictate, but I find shelving, provided it is not too deep, is more accessible than sliding units. I also live with people who don't know how to close things.

some extra ideas without changes to external walls or windows, removing the ens bath would allow an extra biw and giant shower (although an external door from the ensuite could be great for access to the pool or courtyard) strongly suggest you keep the hallway entry to the powder room for easy access from garage and home office and, adding sliding doors could make the home office more flexible for a future baby's room, the original study divided into garage storage and mudroom, walk in new pantry with sink, replacing the crooked central walls allows for the pantry, extra storage, private access to the minor bedrooms and bathroom and a better location for the heater ...simple refurbishing of the kitchen and ensuite with relatively minor demolition and reconstructing of walls and storage could easily use up $150,000 so probably best to plan and price each area separately but there are extras like the sink in the pantry and handbasin in the family toilet that will improve comfort and be much better value than changing any external doors or windows

Please do share the floor plan or some images of living room.

I think I remember this, you had a breezeway alfresco running between the dining and the bedroom wing, this table would have fitted into that space beautifully A rough idea to consider remembering the scale of the furniture. I would run a sofa between both piers with a return on the RH, add a single arm chair and a TV on the wall. Other than that build out the room by extending the alfreso to fit the table , adding another table for the family along with lounges