Did you read the reviews that flooded out when the press NDA was first lifted a few weeks ago? There was near universal condemnation of the starter zones.
It's not something I heard a lot from people here, but members of the press who had not been following the game closely apparently got the impression that the game did not have an open world, because leaving the islands is quest-gated.
There is even a handful here on the forums who keep insisting that it's linear, even though they should know better
Personally, I like the starter islands and doubt I will ever want to skip them. Skyshards, lots of crafting mats, skill books, treasure maps... and NPCs who need help