I just downloaded it myself, so I obviously haven’t read through any of it yet, but it does seem like there’s no adventure module included, so DMs are going to be on their own in that respect. (Which is a plus in my book, btw.) Looks like there are more complete rules for character creation, which is something a bunch of us have been looking for.
All in all, I’m looking forward to seeing the next iteration of the playtest. More when I’ve had a chance to read through it all.