Anyone else find it funny that this has been stated to happen for a few months now and people are all of a sudden surprised it's happening?
I'm pretty sure Bioware knows more about what they're doing than some angry customer because he can't play the game that isn't even officially released yet. You want a date you can guaranteed play the game? Come back the 20th of December. Until then, patience.
The reason they don't tell you a date or time to get in, is because they want to remain flexible. Something could happen, preventing them from letting you in at the time you said only for you to find this out and everyone in the same boat makes 1000 threads complaining. This way no one knows, so it's all a mystery.
Think of it this way, Early Access is a bonus to pre-ordering the game. The actual launch isn't for an entire week. Even if you only get to play the weekend in advance, it's still 2-3 days bonus. No other MMO has offered this service, if it was any other company you would of had to wait till the 20th.
Seriously, just stop complaining and have a bit of patience. Maybe use this time to go find a job so you don't have so much free time to complain about not playing swtor