Firstly, the launch isn't meant to be a stress test, the beta weekends were. It makes sense that they're inviting less people than in the beta weekends, as they're not trying to blow the servers up for launch!
Secondly, there's been plenty of communication from Bioware about the Early Access and how it's working. The stickies say it all; be patient, your time will come.
As much as there are some valid concerns, it's still not going to change squat. I pre-ordered and like many others, am still waiting to get in. It will take some time, and as disappointing as it is, there's no need for all these people to nerd rage all over the forums about it.
I think over the next few days, we'll see alot more people get in the game. With day 1 they were just treading carefully, and now they've seen how it's going to be they'll start letting many more people in.