Wow I too have the same glass above my doors. Mine are all internal swing doors therefore I don't have your delema. I'm in the middle of renovations and mine are staying. My walls will be dark and modern with all the trim white with the original character and it looks great. With your wall, it's a lot to deal with therefore would suggest replacing the slider with a glass door with timber trim, keep your walls light modern and bright and paint your trim dark (any colour you favour) here is my example to give you an idea of what I'm talking about hopefully you can see the value here is a snippet of my renovation good luck....hope my idea gives you plenty of ideas

Side lights for sure and a straight door like To find and design pictured but I'd use clear glass, because the door is recessed which creates the privacy. Paint it white and at the same time paint the balustrade white to feature it again as was the idea when it was designed and return the front patio to red which I guess would be the original colour. Changing these great houses from original and think they look better is like getting an original XP falcon and putting a spoiler on the back because a spoiler looks good on a Porsche.

This is a gorgeous reno, my favourite this year.

Hi Carla, what a beautiful piece. This may sound obvious but the first thing to do is to go through and declutter anything that you no longer need or that doesn’t/won’t live in the living room. That way you can see how much storage you really need. Next consider what you want to display and what you want to hide behind doors. This will guide the type of storage that suits best. Make the mid century piece the feature by moving it along to the middle of the wall. As this piece is on legs, using a mid century modular shelving style around /next to it would look great and add flexibility to your storage. Ladderax is a well known vintage version but other stores have similar - example from Freedom here- or if you are handy you could make your own. Another way to go is modern minimalist, floating cupboards from IKEA would do the trick. Either way I would not have and cabinetry going all the way to the ground. Keeping the space under the furniture will help the room feel more spacious. Finally if renovations are an option you could change to a sliding door entry which means you don’t have to keep the door swing space & could use for more storage.