I do always appreciate some good world building and the earlier era of humanity with quirks is full of interesting potential stories. So bringing in a group that's tied to one of the more prominent figures from the era is a good choice.
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I appreciated seeing the kids hang out for a bit and just reacting to the snow. It was and gave some us some nice small character moments.
Todoroki and Bakugo teaming up should be interesting. Hopefully they both get to show off a bit here.
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It is interesting that that this group is planning on offing the League despite both of them rebelling against the laws of society.
My guess is that Destro's children see the LoV as a perversion of their ideals. The LoV clearly just want to cause chaos and be allowed to enact their own desires no matter how dark or sinister they are. Destro's Children on the other hand might just honestly want no restrictions on when you can use your quirk, but there should still be laws and crimes and such things. Just no related to when you use your quirk.