I think we should except the mess it is and the vouchers we will get. the airlines are in dire Sh*t and cashflow will be very problematic so I understand the hesitation to refund the tickets. I have also quite some money spend on tickets (all via American Express) and I am going to consider them a write off until proven differently.
This is part of the risk of living, traveling and paying in advance.
My work has vaporized but luckily I can also financially take the burden. My thoughts are to all who have less fortune at the moment.