this is well arrange, but just too quiet for me. If the inside backs were painted a Chinese red, all of the beigey objects would just pop! They would assume an importance they don't have now. Sherwin Williams Amazing Gray
This layout is easiest -- could be enough seating if the couch is long and there are 2 ottomans/poufs under TV. Or 2 chairs on each side? Or a loveseat on one or both sides? Plus, I like the built-ins to give our wall some balance.
Built ins define an entry via BHG. DIY Built-in IKEA Bookshelves: "Built-in bookcases not only add a ton of character and storage, but they really can make a small house feel so much bigger!"
When you have builtins done, think outside the box a little. The stepped center bookcase breaks up what could be a long boring line. Arches tops also help. Make sure your shelves are adjustable. And painting the inside backs an accent color really helps too.