Just some screenshots I feel relate to your I feel like if you can get one sectional instead of all the different couches it would look better, behind the sectional you could place a sofa table with a couple lamps ect. and a end table at the other end. This shows a TV in front of the window. You would not mount the TV, the console would ideally be slightly wider than the TV, it would also be elevated off the ground to allow air space, you would also set up your curtain rod to be the width of the TV console (which should be high enough to cover the length of the curtains) this way they don't need to reach the ground but remember they should be hung as high as possible, then put some blinds on the window, and it would be nice with two bookshelves too. Everything needs to be lightened up to open it up, move away from the black and dark furniture pieces. If you end up having room at the end of the sectional possible you could fit another accent chair, and you should be able to keep the small hall tree/ coat hooks space at entry.

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I would center the TV between the edge of the open door and the thermostat and mount it on the wall. Then I would hang a piece of vertically oriented art (about 20" wide x 36" deep to the left of the TV, centered between it and the closed door. The open door would cover the art, but it wouldn't be open all the time, so that would balance the TV. Alternatively, you could mount a board with some hooks to hang coats, purses, etc. on as you enter the house. I don't see a coat closet, so that would be handy. I also noticed the art on the side wall looks too big for the space. What if you hang it to the left of the front window? The wall looks a little wider there. Then you could get something smaller for where you took it down.

To know if you should switch the LR and DR we would need to see a floor plan with dimensions. To add warmth and color you actually need to add color. Your sofa seems to be in decent condition, so I wouldn't recommend getting a new one unless you have the money to burn. That said, if you are keeping the sofa you need to work with the pink beige color. Right now your walls are a yellow beige and your accent wall is black. I am going to start with the accent wall. It is too harsh for your home. It is great in modern spaces and clean color palettes, but you have neither of those elements. Pink Beige and black Vs Pink beige and other dark colors Now for the yellow. I selected this original picture because it demonstrates how pink pink beige is and why it doesn't work with yellow How about something with a bit more gray, blue, green? My favorite - SW Sea Salt Blue, green, purple and burgundy work well with your sofa.