Mostly I think it's in-character trepidation about doing the Wrong Thing. or Not Knowing What To Do, inching forward, no one taking the lead and suggesting something. I think I leave things too open-ended for this crew. They seem to need to be told very clearly what needs to happen and my guess is that both sides are using different analogs. The players are using either the "acting out a novel" model or "fight the bad guys like in Rogue" model where I'm using the Black Isle style "choose what you want to do, the world is your oyster" model. So I may be allowing so much room that they're just flailing.
Work them into it. Right now, it sounds like you need a Big Bad Guy, who wants to kill the Good Guys.
Part one of campaign. Players try to stay alive. This should not be a hard decision process. Ease into choices. After first conficts (preferably with low level minions of big bad guy You can slowly work in choices. Spoonfeed them pretty clear choices, but still choices.
These choices can be choosing allies, all with procs and cons. (you can balance them out, but heck, let the players feel like they choose the right one if they simply do a good in character decision process)
Later on, allow some other choices--as the conflict escalate, give them a few, sluightly wider options, such as seeking out why the Big Bad Guy wants to kill them.
Finally, after time and group cohesion builds, you can see if they are ready to plan how to stop the Big Bad Guy. And if not..well, there is nothing wrong with creating a direct path to campaign resolution. You have to adjust to the groups style, then develop it slowly. Sometimes a campaign just doesnt go where and how you planned. And right now, a new group, with still passive players developing cohesion, this does not look to be the place for an open world choices.
Yu don't need to be fancy, or metaphysical, sometimes the good old reliable plot devices are the best.
If they dont react and get involved with a BBG trying to kill them, and try to find out why, and how to stop him, they just passively defend and keep going on flailing aimlessly, its time to stop, and talk to folks, and ask them what are they wanting to really do. Maybe even be honest and tell them that you think you arent giving them what they want. Because if the BBG solution doest work, then what you just said here to us really probably needs to be said directly to them.