Unless everyone in your party is 18 inches wide, at least one or two people are going to be slamming their elbows into an unnecessary wall divider each time they cut into a burrito. All they had to do, in order to make more room, is remove six or seven tables and reposition everything. No walls, no poles. Just image this new layout, and how much more spacious it would feel — if the walls and poles weren't there.
The other issue... with shared-back, one piece booths is — every time, any one laughs or coughs or moves abruptly — everyone... on both sides of the booth are going to feel it. If the person behind you has long hair, your going to feel it and smell it on your side. Booths should be backed by a wall or divider greater than 6 inches wide (at a nice contemporary casual restaurant anyway).
The way it looks now... I'm sort of half expecting strolling characters and a prix fixe menu.