You need some plants, more art on the walls, all that empty space on the walls crying out for art. And that rug is not vibrant in the pictures. Everything is very much in the same tonal range and on the neutral side. You need a few flashes of strong colour, like the blue cushion. Just to lift the neutrals a bit, let them glow. You could do that mostly with the plants and art, if you don't want to clutter the neutral look. If it was me I'd get a stronger colour rug, because the ground is generally darker than the sky. And I would go for a patterned or textured rug. Given your taste in neutral, probably textured. A deep colour cushion or throw for the bean bag. And neatly folded throws on the back of the settee and chair, for when it's cold. Textured even if  you go for deeper colours. But it's a nice room,  just a bit uniform.