yes, a refresh on the blinds would help. INSIDE mount on each window separately.

whats up with the drapery rods above?

one long rod at that height with sheer panels for a layered look with blinds.

Move the furniture in a bit closer to the TV you could put a console table behind one of the sofas

No on a sectional. a large area rug would soften the space and a large ottoman/table.

you really need to decide how many you need to seat at capacity. People like their own chair, no one wants to sit in the middle on a sofa, and often a sectional is too casual.

finding photos that appeal to you may help guide you, a big ottoman serves many purposes.

No sectional, Solar shades to allow you to keep the view and control heat and UV and you get daytime privacy then add some drapes if nighttime privacy is needed I like the TV cabinet just add a bit of black into the pillows or the rug and the coffee table has to be reachable from the sofa so maybe a much larger one.

The seating choice will be the biggest and most important decision and it will drive the rest. Are two couches working for you or will a sectional better suit your needs. Are you open to other than leather?

A larger coffee table will help, but its shape and size depends on the seating and a rug could ground the room/add intetest. Maybe take a look on line for ideas and save the ones you like and it will make decisions much easier. There are endless ideas.

IMO a layout like this would work for your room to facilitate watching TV

Select an area rug for the room and work your colors from that.

I'd paint the walls a color other than the yellow currently applied.

Select a coffee table that can actually be reached when sitting on the seating. Even if your seating reclines, there are flexible tables that can be used.

I'd try out the layout by placing the loveseat in front of the window, realizing that two lounge chairs would not block the view or the light as much as a high backed loveseat does.