[Made in Abyss] - 8
At the very least, this episode was a welcome return to the production values of earlier episodes. When the cinematography and the music come together this show can achieve a certain level of success, which is only hampered by the gnawing feeling that they need at least another 30 or so episodes to actually wrap up this story. As an anime-only viewer of this story I can't help but feel that there's no-way any studio will be working on that many seasons of this particular story unless it's crazy popular. Therefore, I can't help but feel 'pre-dissapointed' in the lack of closure that we will inevitably get by the time this 'wraps'.
Beyond that perennial bugbear, I don't really understand what the point was of the 'training' that took up the first half of this episode. It didn't seem like our characters really learned anything particularly notable that they hadn't already developed by virtue of their adventure. A quick glance of the manga reveals that they stretched literally 3 pages worth of manga into 10 minutes. No-wonder it felt so aimless. This is the kind of adaptation issue that suggests they have a very 'fixed' endpoint for the anime adaptation that they want to hit, so to avoid overshooting that point they're going to pad the middle out with more fat. This is a problem for a series that feels like its still stuck in the prologue, 8 episodes in.
I also wasn't wild about the scene where Ozen reveals a number of White Whistle-Tier secrets to the children, but the audience aren't privy to all the information being disclosed. I don't like the use of that narrative device, especially in a series where most of the big reveals about the characters and the world are being learned by the audience and the characters simultaneously. To break that link in shared experience is a pretty shitty writing device. It seems clear that the only reason you'd do that is because the writer needs the characters to know some crucial information that they wouldn't otherwise have but at the same time the writer wants to withhold that form the audience because 'mystery is cool'.
On the plus side, I thought all the flashback stuff was handled pretty well and in general most of the scenes in the second half of the episode 'hit home' for me.