I'm not sure if I've made this too obvious-- or if no one will get the hints. It could go either way.
Not one of the big things, but I wanted to show the reason why Nigel can't remember Lucy's name isn't that he's that senile, but he's had a lot of assistants with similar names. So that's not Lucy in that last panel, it's someone else. My plan is that in every flashback he has a different assistant. Lucy has just manged to stick around longer than anyone else.
Also, a return of Mira and Arim's original hair styles from early in the comic. And I guess a minor return of Arim for a page or two.