I vote for hardwood or engineered wood through the whole space, including the kitchen. Opening the wall would be nice, but I suspect your appliances are arrayed along that wall? I'd paint the wall the same pale color as the living space, and hang a really big mirror on the wall if you can't open it. Then you open the wall visually, and reflect the light from the sliders back into the space. (I know...me and mirrors. They are great manipulators of space, particularly when you commit to making them big!)

I think it's a bit tough to give you advice because how you arrange your home depends so much on the lifestyle you lead. That said, I've offered some broad tips to aid in your redesign. Use light furniture with pads, then it can be moved around to make space. You can push the table against the wall and then pull it back when you're entertaining people. This provides some versatility to your space and lets you change your arrangement quickly to suit your needs. Try to find storage solutions that are suspended above the ground. Having a cabinet around the television can provide with a nice dark contrast and additional storage space. Anything high up can be long term storage; all the air space above 7 ft is mostly wasted (Unless you're legendary basketball player Shaq). Experiment! Spend an evening moving furniture around and see how you feel about it! There are many factors about your situation that are hard to consider. Do you watch TV during the day? (if so, moving it across from the window will give you glare!) Is eating together a large part of your family life? What do you see outside of your window? How late do you stay up? etc. Finally, do some critical analysis! What parts of the living room do you spend the most time in? why? Is that chair in the back used often or does it just take up room? Do you spend a lot of time playing with your child and their toys in the little play area against the north(assuming north is up) wall? You can setup a phone to take a timelapse over the course of a day and see exactly what you use your room for and how you enjoy spending your time. I hope this helps and feel free to ask me any more questions! P.S. It seems like your family likes the colour green; I would definitely recommend committing to it and adding some colour to your space! It can be as extreme as painting an entire wall or just getting a new cover for your futon!

Do you own or is this a rental? The pix look a little stretched like realty ones. Since there is a rad between the doors, forget putting TV there. I'd keep the dining close to the kitchen and put the sitting/TV area to focus on the long wall. Start with the fun project of finding a knockout chandelier to hang from that pretty ceiling. Is there a fridge under the microwave? I see only one wall outlet behind the door and one above the counter, so you'll have to use extension cords and cord covers along the baseboards to have enough lighting here. Consider floating your sofa facing the long wall and TV. Then use a drop leaf table behind it for dining. You'll be able to open it all the way for entertaining. Anchor your seating area with a rug 2-3 feet wider than your sofa.

That really leaves you with the current arrangement, replacing the grey chair by the front window with kid stuff and leaving the floating living space opposite the TV. I'd really look into rerouting cable so the TV can be where the large art piece is. It's not usually very expensive and will be necessary in order to keep your walkway from running right in front of the tv.