In case you skipped over Sephirex's post:
https://twitter.com/PS_TRay/status/215094101106896897
You're going to see a combination. 24/7 will happen eventually but like they said, they're going to direct it early on. Since it is such a big world, they are going to want to narrow us down to specific spots and situations to break things. This isn't a 'early access'. This is break our game so we can make sure it's not broken on release.
The question be answered...moving on...