WARNING: Episode 6 visual spoiler below
Ah, yes. I do sit corrected.
First time we've seen it in live action then.
I quite liked it, and it was an unexpected twist for me. It also demonstrates why Vader slaughtered the younglings at the Jedi Temple; because you don't want them growing up and becoming your future enemy. Vader apparently allowed Reva to survive as a means to hunt down Kenobi. But it was also interesting to see more of the hunt for Younglings in this series; including the flashback of Reva hiding among corpses, plus the body of one of her childhood peers as a trophy. It does go to show just how irredeemably low Anakin has fallen... to the point where he is willing to mass murder children and their teachers; the equivalent of a school shooting (school sabring?). Of course, as the audience we know that Anakin has done this before with the Tuskens; but the rest of the galaxy never knew that. Plus Anakin regretted and felt ashamed of his slaughter of the Tuskens (breaking down and crying in the Lars garage in front of Padme). Of course, Anakin does also feel sadness and regret over his actions as Darth Vader; it's just that he's buried those feelings deep inside. It won't be until the end of Return of the Jedi when Luke taps into Vader's inner conflict to win Anakin back to the Light Side.
I also liked the journey that it took Reva on, nearly becoming the very thing that she swore to destroy; just like Anakin. Only that she ultimately chose to spare Luke and avoid sharing Vader's fate. This also forms a sense of closure for Obi-Wan Kenobi... he failed in preventing Anakin from falling to the Dark Side, but he succeeded in repeating this mistake with Reva.
But Obi-Wan is still in 'hide and retreat' mode with Vader at large. We see him tell Reva to forget her life as a Force user and live a normal life, and we then see him retreat into the desert. I was personally hoping to see him move into the house that we see him living in in A New Hope; perhaps even having Qui-Gon Jinn's ghost guide him there.
<knowing.nod>
P.S.: Just gonna put this here...