For the fireplace inserts go ahead and do the green order a second set of panels that you store that are more neutral. In 10 years or five years you may not like the green anymore. It's possible you won't have access to different colored panels at that time. As for the color I like the ideas of going into those silvers it would coordinate very well with your blue couch and it will pull the blues out of the curtain panels. For the wall coloring use the warm golden color in the drape. There is one piece of the flower that has this color and it will balance the weight of a dark couch. If your room is small don't go too dark in this color. You could use it on the main wall and pick two shades lighter on the other three walls.

That is a really small space,I think maybe an apartment size sofa would help you get the look you need and a smaller table or even removing the table and using two bar stools

I'll start with what I personally don't like , but obviously some people do -- The two couches look like they match ( which is good ) and in a green leather ( again good ) , but the browny olive carpet doesn't really work . Than you have a green fabric rolled arm chair , that is 100 years old in design and fabric design -- just because it is green , doesn't mean it works with the couches , because it doesn't . The chair that does tie in ( the green leather one ) is in a funny spot , but I also think it would look funny between the 2 couches . Then you have a nice armchair 'up the top' , and I think/hope that the fabric matches the dining chairs ? Then the TV area looks 'busy' . Probably the least of your worries , just an observation . SO -- I'd move the rolled arm chair right out of the room . The couch along the window I'd move around to beside the other one , and then the single green leather around by the window , so you have a green leather semi-circle . Personally , I still don't like the leather and the the carpet 'clash' , so I'd like to change the carpet ( or the lounge suite if you are wanting a change there -- although you'd have to go maybe that 'shooting lounge' aged brown leather if you want to keep the carpet ? ) . 'Up the top' by the bookcases I'd try and get a second chair the same as the other wheat/grey one , and add a coffee table -- so you have a conversation area , and a lower lounge/TV area . If it was me , I'd probably remove and wall in the 2 'left-hand' side windows -- the one that the blind is closed and I suspect is closed most of the time , and the one behind the TV . I'd then wall mount the TV ( if done professionally , you get the power and aerial all hidden ) so it cleans up that area , but that does start getting costier .

I think you are wasting money . I'd leave the columns , do a couple of bi-fold aluminium doors , do a nice leather corner suite , and artwork , a Tv , make it more livable . I'd do a glass balustrade on the small stairs , 3 or 4 creeper type potplants and a couple of 'objects d'art' along the solid balustrade . Do you have another dining room ? If yes , make part of this an office/study ; if no , then a nice table and chairs . Right now , it looks unloved -- make it easier to fall in love with it , and you will !