Unless there are a lot of pre-boarders, many flights to MCO, almost every passenger in the "B" group can get seats together. A lot of us overplan. Other than looking for an exit row seat there isn't any REAL reason for passengers in the "A" group lining up early and even "B" passengers generally don't have to line up as early as many do.
Some people don't mind it. Others do. Not everyone has the ability or know-how to check in at the 24 hour mark. You've obviously learned how to work their system. Nothing wrong with that. Personally, I will keep my $0 flights and hop into that empty First Class or exit row seat (when available!) or my T & F only flights when we need confirmed seats.
My point was... it puts the burden on the passenger for that 24 hour period and airport arrival time if they wish to sit together or get an aisle/window, rather than the airline. With other airlines, one can confirm ahead, schedule changes or not.
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