This isn't an "expansion" issue but I'll take this opportunity to gripe about the restrooms at ABIA (and at most large airports). When you finish your business and you need to wash up, there is NO PLACE near the sinks to hang your coat, or put your briefcase down, to keep it from getting wet/dirty etc. If I was designing an airport bathroom I'd include lots of hooks and shelves and surfaces you could rest/hang things on. But it seems to be an intentional design trend to not have ANY surfaces other than the disgusting wet countertop or (worse) the floor. Even the paper towel dispensers and hand dryers are designed with rounded, sloping contours so you can't rest anything on top of them. Is there a name for a design ethos that is intentionally inconvenient and inflexible?
Also, to whom it may concern: please stop with gimmicky airport restaurants. When I travel I want affordable, quick, tasty, calorie dense food. If it reflects local cuisine that's great, but I don't want airport sushi. I don't want a "breakfast taco" made with egg whites, organic yogurt, and a gluten free tortilla. Some of these weird airport restaurants must be laundering cartel money or something.