Instead of a desk in the right lower corner, if that's a solid wall and not a window, you could put a bookcase there. Ikea's Billy bookcases with the added height pieces are well priced and quite nice looking if there is an Ikea near you.
I made minor changes to your drawing, including adding a butler's tray in the upper right corner, but it could be in any corner. There are two below that I like. I also moved the sofa 6" further from the FP in order to have its front legs on the rug that I added. The rug was a real problem. We can't bring the rug much further toward the bottom wall because you don't want to walk by there with one foot on the rug and the other off it, so I custom sized your rug, tho a rug dealer may have something near that size. You can always have carpet cut to the size and bound.
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chair table chair combo
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