In fairness, if the login servers were capable this would be the perfect time for a preorder launch. Think about it this way: early access players only got the game 4 days ahead of regular players.
That's not a lot of time to do anything meaningful, so what's the point? Aside from preorder bonuses, obviously. BUT if the EA was on a weekend, and the regular launch was on a weekday, then EA becomes a lot more meaningful.