What do anniversary dates have to do with your comparison? The delta strain mortality rate may indeed be lower, but since deaths lag cases by a few weeks it is too early to tell. Also the current outbreak may be infecting a different demographic since lots of the really vulnerable have in fact been vaccinated.
Either way, I cannot see lockdowns once we have passed some (arbitrary, politically expedient) vaccination uptake. In our well-intentioned drive to zero cases we have set the stage for covid hysteria and given the government a really convenient threat to protect us from.