Given the new UA change fee waiver for all 2020 flights changed prior to May 1st, when attempting to make a change self-service at United.com, I see the following:

1. Original fare class was D non-ref and no matter route, the new itinerary is pricing only in D class or above, or in full Y.

2. No residual value is offered, no matter the routing.

In summary, I’d like to take my $800 non-ref D fare ticket and change it to a $500 P fare on a new routing while getting the $300 residual in an electronic voucher. Possible?