A tool to create events/routes and share them with other players is one of the top items on my wishlist.
On the subject of longer drives, I think the map is close to an ideal size to allow for a wide expanse and a very healthy amount of driving roads without being too time-consuming to traverse. I wouldn't recommend alternating between LA and NY as you check off street race events, but distances like Miami to NY? NY to Chicago? Chicago to Las Vegas? It doesn't take as long as many people might think.
Freedrive is the game's defining experience, IMO. You're missing out if you don't venture out into the "blank" areas of the map.
Don't forget the rivers, too -- before the game came out I wouldn't have guessed there are narrow rocky passages, extra dams to jump over that don't feature in an event, and even rapids in some places!