My personal hope is that it will make newly-settled cities much more vulnerable. One of the most frustrating things to me in V is that if the AI forward-settles you, you can't punish them unless you literally immediately drop everything and build up a huge force to take the city--a token city, far from their core and very close to yours should be very easy to conquer with a handful of units. By far the most annoying thing is when a settling party that's under fire just settles the city which immediately starts bombarding your units (ugh).
Forward-settling should be an extremely high risk move, but you can get away with it far too easily in V (or at least, the AI can, on higher difficulties).