I hope the tweakers at Southwest restore non-expiration of funds. That's the one change which clearly imposes much more costs on the customer than any benefit to Southwest.
The benefit to Southwest is it ideally helps their balance sheet (lowers liabilities) to expire the funds sooner. Ideally because they will be able to realize greater breakage (customers who lose funds since they expire) faster. Now if every customer still spends their funds... then this little scheme fails. But you know many people will end up losing funds due to expiration.