Doc,
You haven't mentioned the nature of your responsibilities, and of the organization itself. These details would dictate how I would proceed.
For example, if it were an IT setting like my own, and things had begun to get that screwy, I'd be considering another job, either within or outside my current organization.
You mention that the things required of you by management's Bold New Vision
are the same things needed to secure another job. What's wrong with discreetly shopping your resume' around on Monster or another more field-specific job site?
At the core of this, I see you caring a great deal about making a significant contribution, but feeling a bit trapped or blocked. It helps me in that situation to gain new perspective by realizing/reminding yourself that you have significant control over your outcomes. I usually do some 'outstide the box' brainstorming, not paying attention to how feasible or realistic the options are, but considering even goofy things, like moving to Tahiti, sleeping on the beach all day and tending bar all night.
As a PhD, I'm sure you are capable of doing nearly anything you want. Once you've made your brainstorming list, including everything from "maintain status quo" to "chuck it all and go live in the woods", begin to narrow the list based on your long-term goals. Be gentle with yourself, remind yourself to be a human being, not just a human doing, and then move forward with the confidence that your ARE in control of where you go from here.
HTH,
Fig