A quick fix for the dining room would be to center your dining room table in the dining room area. You can define this room a bit more clearly by adding a chandelier centered above the table. For the living room, the loveseat can remain on where it is, but pull it away from the wall. Move the loveseat so it more to the right, it does not need to be centered under the window. Place the larger 3 seater couch along the wall where the coffee table currently stands. It should rest under the window about a foot away from the wall. Place the side table at the corner between the now perpendicular sofas and center the coffee table in the room. This will give you space for a nice entertainment unit where the large sofa previously stood. Alternatively you could place a credenza here to store your dining room dishes or additional storage. Lower the painting on the wall to eye level so the center of the painting is at 54" above the finished floor. Purchasing new window treatments or drapery panels that coordinate with a new throw and cushions for the sofas will tie the elements of the space together and make it more cohesive.

I am planning to add scatter cushions and think if I do a pair of larger ones for each end so they go over the arms to creat height at each end, and a couple of smaller ones, I want to bring some colour in too. I do like the idea of a larger side light at either end to, Switching the sofas is going to be my final fix if all else fails!!

I think, like you said, due to the fact that there's a larger space when it comes to the hotel lobbies is the reason as to why it works. I think that no matter what you put on the walls (whether it be concrete or marble) will result in tiles not working out. The industrial look tends to be exposed brickwork anyway, or cream or white colours so maybe that's an option you could look into. What did you end up doing?

wow, what a transformation