Gonna have to side with Chelsea on this one. Expedia has no obligation to adjust travel plans based on anything other than what the user chooses. Flights are customer-chosen, not Expedia-mandated.
This is where due diligence as a customer comes in. It behooves a person, especially one that is unfamiliar with the airports and connections, to ask. I have no doubt that an Expedia rep on the phone could have answered any question about the flights if questions were asked at the outset prior to booking. I know I've had informative conversations with customer service before when I've booked flights, particularly through Dallas-Ft. Worth, which I read was a larger airport than I was used to.
Being informed is a personal responsibility. It's on the customer. The same way it's imprudent to buy a potentially hazardous product without understanding it, it's imprudent to book flights without being aware of the conditions that will likely impact your travel.
RE: United and Lemonade--Stranded in Chicago