Totally agree with FUEL (plus it has no houses!), but where do we see The Crew's map size on this scale?
1) Not enough
2) Perfect
3) Somewhat too big
4) Way too big
I still have not driven every single square in The Crew yet (could do it in less than one hour if I really wanted to). I think the size is good. I don't think I'd complain if it were slightly larger or smaller. I would just change how some of the roads link up to make stand-out cruise routes.
I think TDU1 proved that if you link up a bunch of great roads with great but alternating scenery/moods that can keep you busy for a play/cruise session lasting ~1-2 hours with solid physics and netcode any other feature gaps can be filled in by the players' creativity.
Also important (to me) is having sections of dense city/residential streets - sure you may not drive them all, or very often, but it's something that NFS open worlds have always lacked and I find them inferior because of it.