In the end, my reasons for moving down the timeline and introducing a new cast have more to do with keeping myself entertained, on the assumption that if I get bored, my readers are going to be even more bored.
I was too thin. I was working all the time, not eating at home. Spaghetti bolognese on planes. Ugh. Now most of my meals I cook for myself with organic ingredients.
You get in trouble, you have to evaluate: Is it worth getting into trouble again? It's a lot easier to make that decision when you have a career at stake.