Personally, I don't mind WidowTracer since "enemies attract" has been a staple of shipping since the start. But I want to see a lot more Tracer x Emily
in part because we don't have enough canon yuri couples and we need to support that, in part because there's a new character in the OW canon and I'd love to see people explore that, but mostly because Tracer and Emily are so damn cute together.
Although I wouldn't mind a version of this where Widow is utterly baffled as to why they're coming on to her at all.