From the style of the dining suite, the hutch and the club arms (square) on the sofas it looks like your design style is more traditional than contemporary. If this is the case, you will probably be happier with the Persian rug. However the orange, yellow and turquoise chevron patterned scatter cushions don't work with this rug as the colours are too contemporary. If you like turquoise, try teal as the deeper shade goes well with red, grey and black.

Agree with above comments - large rug, darker colours to balance the beige. And I also think the art work is too small and too high. However if you are attached to these pieces they could be hung together on one wall, lower, maybe re-framed in similar frames to give them cohesion (black to match your new cushions?). This would create the effect of a larger art piece. (The centre of your art should be at average eye height - and in that room you are sitting so eye height is lower!)

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I swap out rugs according to the season. This is my summer jute rug. It adds texture, ties in to the rock wall behind it and the warm natural tone works with the rust and cream cushions. At some point the grey couch will go for a warmer tone but I think it works pretty well together. The other rug is a distressed silvery with muted patterns in rust and blue. This works well with the couch and cushions and I lean blue artwork or ceramics on the shelf to tie in with it. Mixing up the rugs & decor keeps me from getting bored and helps mark the change in seasons ( also prompts a spring clean!)