I hope it isn’t too late to make a small suggestion regarding the title system: could you add a small message when a characters title updates?
At the moment the titles feel invisible at times and I frequently forgot to check after events if they had changed. A small line of text calling attention to any updates could help.
Something like “The people of Mondstadt now know <Character> as the <Title>“ or “Certain circles in Mondstadt now know <Character> as a <Title>”