When you get new paint mixed, it is more likely to be slightly different and when you add years of exposure and aging on top of that, you are likely to get some variation. Give it some more time -- even thought paint dries to the touch in minutes, it isn't completely dry for a lot longer. Also get away from it and see if you still see it -- or better yet, have someone else see if their eyes are drawn to any of the touch ups. Clean the wall where ever possible instead of using paint. Then see what you can do to help the places that need paint. If you have a cooperative paint person at your Lowe's, you might be able to get them to help you tweak the paint a bit. You might be able to get a sample pot of a darker shade that you could mix in. I have also been known -- well, not known, but I have done it -- get out my other cans of paint or even craft paint -- those 99 cent little bottles, and mix until I get what I need. Work with small amounts if that is all you need - take a cup or jar and mix a small amount -- working with dots of the tint paints until you get the hang of it. Test on index cards or posterboard, a plain white paper plate. I haven't done it often, but it has pulled me out of a couple of cracks. Also, use a small craft brush and only fill in what is essential. Another trick I use when touching up is to feather the paint out. sometimes adding a little water or using a wet brush to thin the paint as it goes over the existing paint. That is more likely to work on your living room paint (lighter color) than the red, but I've never tried it on a strong color. On the red, I'd be inclined to put the photos back up if the nicks don't show - change out the pictures in the frames if you are happier with that. Even if you repaint, there will be new spots that need retouching when you move your things out. I've bought two homes thinking I wouldn't have to paint most of the rooms only to move in and need to paint everything. Worst case, if you feel you need to paint the LR, get the color as close as you can and let the break of the white and wood stairs provide the break you need to stop. And if you do repaint anything, leave them the leftover paint for their move-in touch ups.

Looks like majority has rug under formal if room is large enough and no rug under kitchen table due to messy eaters. Funny, my old house had wood dining table on wood floor. I had to put felt under all the legs, then moved a few weeks later and had to remove the all because new house had carpet. Now I am removing the carpet and having to put the felt back on. But since I will most likely have a rug under there, I may only do the chairs in case the chairs get taken off rug for some reason. My room is large enough to have rug under table with about 2' of wood around edge of room still showing. My kitchen has no rug on wood floor. It is amazing how many crumbs my kids drop each week. I almost feel like putting a "splat" mat under there like they do for highchairs.

Since you are willing to paint, I would consider the color that is in the background in your beautiful drapes, as the dark walls make it feel cave like, your lovely wood is not noticed and if the walls are lighter, the windows and view may take more prominence. In regards to a rug...I think an overdyed raspberry colored rug would feel traditional, yet modern and also elegant. Room is not quite what I described but may give you a feel for the look with lighter walls and an overdyed rug.

Just experiment with some inexpensive vinyl tablecloths to find a color you like best, OR, maybe you want to paint the table? or just the table top, to bring some light into the area. The dark furniture is absorbing the light, the painted wall color is providing. You may want a different dining set? https://www.wayfair.com/furniture/pdp/gracie-oaks-ridgley-7-piece-extendable-solid-wood-pub-table-set-w001171274.html?piid=364988432 There are many options in that size of set. Painting it would be the most labor intensive, adding light colored chair seat pads and a coordinating table cloth, table runner or placemats would be easiest, or just buy a light colored set of furniture. The bonus there is, they really don't show the dust as much as the darker wood does. LOL... But a set this color, as the link above is for, ----or the table runner and chair pads below this picture, might be the best short term solution since your dining set is very nice.. https://www.bedbathandbeyond.com/store/product/mother-of-pearl-beaded-36-inch-table-runner-in-ivory/5316905?skuId=67414284&poc=3298507 with this and than find some slim ivory chair pads for the chair seats. You may find other sets or styles you like, I just think Mother Of Pearl is timeless and classy, not gaudy, and would be special in your dining area on the table top..