@Wccftech they confirmed that Mass Effect:Andromeda will not be entirely explorable due to the absense of relays leaving the door open for new content at a later date.
More information.Speaking about the Tempest, the ship players will be manning to explore the Andromeda galaxy in search for a new home, Mac Walters confirmed that it may not have access to the entirety of the galaxy, most likely leaving the door open for future games set in Andromeda.