Don't go overboard with the acryllic. There is plenty of it already. Remember the purpose of a "coffee" table is a place to set down your coffee cup. Therefore, I think it should have more substance than acryllic so your room doesn't look like a show room for an acryllic manufacturer. I wouldn't mind if it matched the silver sofa table either. Center it with the FP, and draw the seating to it. I think once your seating is gathered around the coffee table, the navy bench will fit nicely at the window, behind the two chairs. Here's a run-down of what to think about when shopping (from Vern Yip of HGTV.) https://www.hgtv.com/design/decorating/design-101/10-tips-for-finding-the-perfect-coffee-table-pictures

Have you gone chair shopping yet? Often the biggest chairs aren’t necessarily the most comfortable. Have him sit in several before you decide. Does he prefer a recliner? Or a chair and ottoman? These chairs come in all sizes and shapes. My husband’s favorite “easy” chair is the Alex chair by Arhaus. It comes in leather or fabric, and as a recliner or with a matching ottoman. It fits him. So....don’t rule out an “easy” chair without having him try them on for size. Then, perhaps, make a deal. He chooses the chair; you choose the fabric. Explore your Options! And then “educate” him about the possibilities! Good luck,

We can't see what you have there now. Your console lamps are great. I would consider adding a floor lamp to the other side of your sofa, and removing the ceiling light. Or, if your ceilings are high, you could put in a semi-flush mount with diffused light that shines upward.

I like those sleepers too; here we call them "clickers" or "click-clacks." They are hard to find, and most links take you to futons which are not the same thing. I have one in my vacation rental cabin. For your space, I would prefer a small scale sectional on the two wall sunder the windows. No curtains, but top down/bottom up shades where you can block roof top views or electric lines or all of it. Add a large storage coffee table. I like this one myself and it comes in a blonde finish too that might be better for the beach. Get a pair of floor lamps (not dated torchieres) for each end of the sectional. Then I would center the TV/FP on its wall and add one or two swivel chairs perpendicular to it. In the corner where you have the kitchen chairs, you might try a game table with a pair of chairs for checkers, chess, scrabble or monopoly. How about a new, more beachy wall color like Sea Salt to work with your sandy beach carpet? Last of all, upgrade your art and wall hangings. Here's info on the paint color. https://pizzazzerie.com/lifestyle/sherwin-williams-sea-salt-paint-color/