If you want to use the old PS style galleries, you can use your old version of PS or place the old galleries in the corres[ponding pace within PS install.
Though the Web gallery option will still be missing I guess from Bridge, unless you ad that script too.
The galleries being in Bridge makes more sense, but the slowness is a bit painful considering how fast everything else is and the inability to save templates is very annoying. Though that may have been fixed in the release version.
The beta works so well, I've not got around to installing the release version yet - mainly as I'm going to do an fresh OS intall soon, well when I have time!