As Is (in all honesty, the table is usually pushed against the left wall)
This is how it would be with a banquette
(I have 18" for the seat and 4" for the back, I am looking to build in some storage underneath and the full 22" will be what I need)
It would give us a nice pathway to walk from the kitchen into the living area while still allowing for the table to be fully functional as a 4-seater. The table is from Ikea and has a built in leaf to accommodate 6 people. We already have 6 chairs (I can feel our storage unit filling up!) With only 650 sq ft of space saving an inch here or there helps a ton.
Here are some pretty examples of banquette seating...