To add to this while the animation duration increases, the riposte duration does not, (which I'm sure is intentional) but it does reduce visual clarity overall.
Regardless, all the effects of Arcane surge only effect the first shot on Seven's Power surge, (even the +15 spirit power) Whereas the on hit damage from Drifter's ult gets the full effect from the +15 spirit damage for the entire duration, as well as increased ult duration. Clearly a bug...
Paradox gets 80 percent spirit lifesteal during the swap, but this can't be increased by healing booster/Tempo. Other abilities that give lifesteal (Drifter's Rend, Abram's Siphon Life) do get an increase in lifesteal. Is this intentional?
It appears that split shot can hit the same target multiple times if you have Armor Piercing Rounds as well. It appears to only work with shotguns and alt fires.