I don't like the flashbacks to Dexter's mother, takes too much time away from the 1993 timeline!
There is already a lot going on in 1993, with the focus on Deb and her BF (who I assume is secretly a serial killer, though I've only seen up to ep5), Dexter at work with colleagues, Harry's legal issues, Deb and Dexter at home, Harry and Dexter at home...
So I don't like them flashing back to Dexter's mother (with younger Harry and small Dexter).
Not enough time in the episode to give scenes to another timeline... plus we know what happens to her anyway.
By the way, I've only seen the first 5 episodes, because I'm trying to make it last until April or May, so won't have a big gap between Original Sin and Resurrection (which starts in June).