You can't change route without prompting a change fee.

Your best option is to await possible cancellation (which will allow you to rebook or apply for full refund) - or simply ditch the tickets if no sch. change or cancellation.

The best advice currently is never to buy FR tickets far in advance - for two reasons, (i) difficult to predict if conditions change and (ii) tickets are much more expensive if bought far out than 1-2 weeks before departure (I can say this from extensive experience with pricing of FR tickets). For flights in January (low low season) it would be an expensive mistake to have bought such tickets long time ago at presumably much higher fares than current.