Glad you like the single list view! Unfortunately, these two things are linked. One of the reasons we used the separate cities view as the default is that Google just returns fewer results when you grab them all together like this. I'm not sure why; presumably some kind of optimization on their end. We have added results from Bing below the Google ones to help with this. (Click the Additional Results button to see them.) However, it's still definitely possible some will be missed.
Fortunately, we are working hard on a completely new option that I expect will be better even than the old stacked cities. Basically it will provide links directly to results pages on craigslist (no affiliation). Unlike our current Direct Results mode though, you won't need to click a separate link for every single city. They will be grouped into chunks of 1-3 states per link, so you can search the entire area around you with only a couple of clicks, and the entire country with only 20 or so. The best part is, because it doesn't rely on a search engine, the results are 100% up to date, with none missing. We're hoping to release the first version of it next week.