I had the same problem with Charlie and his relationship with Dree and Em -- if I'd realized at the time I thought that up how difficult it was to give a sense of a relationship happening offscreen, I probably wouldn't have done it, or at least not in that form. (Although it really is such a huge part of Charlie's character that he's good at communication and spotting/taking care of emotional needs because he's got that experience doing so in his various polyamorous relationships, but I probably could have done it another way.)

I was always so in love with Deb's ability to convey so much plot in so few words with her messages from Barty to other Aurors. It did such a great job of filling in the holes.