"We need to know what kind of plans and ideas Facebook has for Oculus before making a final decision," - about what exactly? Facebook surely has control over what they want to do, and they could lie and make the current developers work on the project in good faith that they'll lead to what they want. They'd be promises only I imagine and Facebook as a company could change their mind whenever they want to suite their objectives. Sure they might piss off the core developers, though Facebook will already own the project, etc..

Re: 9/10 still developing for Oculus - They've already invested resources and time, and not sure there's a comparable competitor yet - though I imagine those are coming.