There are many ways to put a puzzle together, I suppose.
pratfall act far too many times for it to be charming. The entire opening sequence at the lake came off as pretty tired to me, to be honest, and I didn't enjoy much of it. This may be a bit of a yellow flag to watch out for as we go forward.
Claire's flashback (as mentioned) was effectively 100% confirmation and 0% surprise - she was indeed a dupe, and is herself a victim - but that's fine, because we needed to know that for sure. I suspect Karl will initially reject her mitigating circumstances but eventually come around - he is a 15 year-old boy in love, after all. In fact, the salient point here is that both of them are pretty much in the same boat - they seem to have been exiled for convenience's sake. Karl is smart enough to understand that once his initial shock passes - the hard part, perhaps, will be finding something to replace the motivation his drive for revenge has been providing him. As for Claire, there's one major difference in her case as opposed to Karl's - she blames herself for what happened, and he doesn't. And that's a very significant gap between the two of them.