Pretty space that will only get better with tweaking! I agree with Jan's suggestion. The couch on the wall beside the fireplace doesn't look right--too crowded. I understand the desire for that symmetry with them facing each other, but even if you get rid of the TV, having a couch there just doesn't work. We have a similar layout in our living room--those corner fireplaces make furniture placement difficult! After eight years and trying many different layouts, we have settled on a plan similar to Jan's. RugsUSA.com has some oversized rugs, and here's one I found on Etsy after a quick search; I think the room could benefit from something vintage/antique since your other things look new: https://www.etsy.com/listing/858351833/13-x-16-contemporary-turkish-oushak-rug?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=13+x+16+rug&ref=sr_gallery-1-25&organic_search_click=1&pro=1&frs=1 

The very light color bracketed by the very dark color doesn't appeal to me. If you're not going to change the very dark color, I would prefer Storm or similar mid-tone gray in the middle and a red front door. Almost any bright color would work for the front door with these neutrals. The current dark color blends with the bay window section and doesn't draw any attention to the entry.

Wallpaper. Warm wood accents. Greenery. Runner rug with warm colors. It’s a classic room so have fun with the accessories!

Orchids are very easy to care for, almost as easy as succulents. After it blooms, if the flowers spikes turn brown cut them off about an inch from the base. If they stay green you may get a re-bloom or babies. Some experts suggest that you repot an orchid after it loses it's blooms. I have mine in an orchid mix for Phalaenopsis from Lowe's, but if you can get a better one from repotme.com, or so the "experts" say. I use distilled water with a small amount of orchid food mixed in (also from Lowe's) and water when the orchid feels light when removed from the cachepot and the roots look white-ish. be careful not to get water in the crown which can cause rot. The aerial root with the brown section is fine as long as the end stays green, but you can cut it off if you like. Cut off any aerial (outside) roots that are brown and completely dried. I know it sounds complicated, but it's just water, orchid food and bright, indirect light. Now if someone could just teach me how to get them to bloom again, I would be happy. I can keep them alive, healthy, new leaves, new roots, even have a baby growing, but no blooms ! Guess I need to go over to our Orchid forum https://www.gardenweb.com/discussions/orchidsand ask for help, or watch some YouTube videos. Anybody here know how to get new bloom spikes on a Phal ?