The biggest reason Bisharp works out really well in Ubers, is because of the insane amount of Psychic and Ghost-types in the tier. Unlike in OU, the Dark-type is a very sought out for typing in Ubers, because of how much the metagame is weak to it. There are a ton of common Pokemon in OU that threaten Bisharp, whereas Ubers has a harder time dealing with a +2 STAB Sucker Punch because of the lack of Fighting-types and super effective priority. Comparing Bisharp's effectiveness in OU to it's effectiveness in Ubers is pretty much night and day. So yeah, not having an OU analysis does indeed say a lot. If you want to use Bisharp, use it in Ubers.