Check the support page for each beginner box, there is a PDF follow up for each that is at least three times longer (and less hand-holdy) than what's in the box.
i generally don't run the adventures as published, the only one I've stuck fairly close to was Beyond the Rim, which I really enjoyed. But there are good ideas in all of them (so far).
The adversary decks are very useful for when things go off the rails and you need some quick NPCs. Now that they've added a critter deck there's something for every occasion. The spec and crit decks are useless IMHO, the kind of thing that adds clutter at the table and zero benefit.