The even hotter fix for beta 0.69 is now out, mostly fixing more urgent online stability issues, but also enabling tighter control over capture zones for maps. This means that you can no longer capture a base from the edges of it, but you or your fellow soldiers need to get closer to the base center. The future PvP maps should definitely benefit from this feature.
See the change log for details on the forum.
the flag capturing should get faster the closer to the centre of the capture radius you get.