Beautiful table. I don't particularly like the metal/cane chairs. Too 'light' in appearance. Do you use the chairs by the window? I think they are too close to the table and they are too big in comparison. Could be the angle of the photos though, may look different in real life. I don't think your ceiling is too low to hang a pendant above the table. How do you change the table position? If you only turn it around, you can still keep it centered under a light. If you move it to the wall it's another story of course. The two paintings above the console should be hung lower and I prefer them on one level. You can add table lamps on the console and a floor lamp in the corner between the windows. If you use the two chairs, I would add a table in between and angle the chairs a bit. I'll see if I can find you other dining chair options.

Also take a look at Room and Board....they have several tables with different wood finishes or wood/steel/metal bases and a good selection of various tabletop materials. Also if you prefer a wood table, an area rug underneath the table could also help to break up all of the wood too.

Wax is good on a dining table as easy to apply a bit more in the event of cup rings etc.

If it is a casual buffet type meal you don't need to go over board on the dinner table. I would suggest a lovely table runner a pose of fresh flowers (not high so that you block peoples view across the table). Some lovely place mats, standard silverware and glasses all set out and a couple of very simple candle sticks - I also love the idea of the mini Led Fairy lights but maybe around the room (perhaps a mirror if you have one in the room). If you have napkin rings or can make lovely napkins shapes out of origami, that adds a little bit of class and perhaps a small chocolate at each place setting. Don't go over board. After all it is the company (and the food) that should be the star of the night and you need to relax as well. Not every decorative piece needs to be on the table.