I use Todo on iPhone, Mac, and Web. If I add a new list, and I don't want that list to end up in the Focus List, I have to hide that list in three different applications: Mac, iPhone, and Web. This seems silly. Why can't the Focus list settings sync itself between all devices?
Adding this capability would really help users with multiple devices to get started with the app. While working out my organizational processes and figuring out how best to setup the App for my use, I made several tweaks / changes over the space of a couple of weeks and I had to go into each of my devices and modify the settings to suit, and with having 5 devices... This was an annoyance.