I miss the AA 25k one-way TATL upgrades - no minimum fare, no copays - from a few years back.

I haven't used miles to upgrade in a couple of years because it's become such a poor value. Thankfully, the UA SWU's are still reasonably usable in most markets.

One decent value for a top-notch C product is using a UA SWU for LH metal. It's allowable on a standby basis with the main drawback being that it's an even bigger crapshoot than traditional standby. That is, LH might have plenty of seats but decide not to fill them for catering or other reasons.