omg here we go again, do we really need these childish, immature power meters? especially when - in a story- you can pretty much come up with any explanation why dude x defeated dude y?
and anyways -for me- only matters who counters whom and to refer to reaper -for instance- any close combat flankers in overwatch bring more to the table than him, tracer mcree genji are all better picks I feel, I might only ever pick a reaper vs a very heavy tank setup MAYBE, since Mccree is SO much better at destroying tanks then reaper.
also, in some way i feel, the outcomes of the duels/fights are all nods to the game, since a reaper will always beat a winston 1v1, same with genji -having closed the distance- has an advantage over hanzo (hanzo might scatter arrow him or even get a headshot, like the scatter arrow is a kill if he can pull it off (did genji dash? didnt he?) the head shot is much harder).
also widow doesnt really defeat tracer, its just that tracer cant protect her objective.