You will need space to walk and for your feet if you turn the chairs around - if you put a divider in you will block the view from the dining table out to the balcony - and thus make the kitchen and dining room both have no view ! So if you keep it open, the natural light can get through !

It will be better if you don't think of separating it .

Hi, you can nicely put a beautiful runner on the center of the table, with placemats, bamboo tray with all accessories like salt and pepper, paper napkin, nice cutlery, LED candle, you have lot of options. check pinterest for more designs.

Thanks Nitin. Only issue I can see with centre sofa is number of guests one can serve. With wall side L-shape sofa, we can extend the seating capacity by using dining chairs when there is any need. Anyway there is nothing like perfect thing and every design will have pros and cons.