This is a bit surprising given the fact that it was only what? 7g? Most MMOs are 20+. Wonder if they are going to patch something enormous onto what we already have. If so, when does that happen? I can't imagine you'd have to patch during EA because the massive amount of people trying to get on/patch/etc all at once when Aug 24th hits will lead to many a gnashing of teeth and forum spam.
This was a bit odd to me too. I thought that the game was in tact past lv20 on the phase 4 beta only they locked it off. I haven't heard any dataminers confirm this though.
SE got wise after our XIVDB guys parsed out a bunch of P4 things from the Benchmark
They removed most things that weren't supposed to be available in phase 4, I fully expect some patching to be available Friday where we will get the rest of the game.