This flashback has been very good so far. I wouldn't have guessed that the most terrifying group of criminals in the Hunter verse got their start as a fan dub enthusiasts club. I doubt the conclusion will forgive them for the kurta clan massacre but seeing them this young does highlight the tragedy of what they turn into. Especially Chrollo who so far has a completely different personality and seems amazing at everything he tries. I bet he could have passed the Hunter exam as young as Gon and Killua if he had the opportunity.
Togashi is as impatient to get the Dark Continent as he was to introduce Ging into the story, which is to say not at all. If you consider the current story a diversion to skip through before the actual really cool DC arc then you are just setting yourself up for disappointment.