I don't think this is exactly bait and switch; in that home health nurses manage a caseload of patients, they are in fact case managers. Hospice nurses are often referred to in the same way. But it's not case management in the way you were thinking, nor will it appear as such on a resume when you pursue case management in the future. For example, you will be collaborating with other providers, but that typically means on the phone in between visits trying to get orders, arrange labs and other therapies and resolve issues that have come up with your case load.
I can see red flags here, too. Check out the home health nurse forum, you'll be able to see that unless your case load is very small, doing the job without HHAs or LPNs means doing all the hands on care yourself plus all the assessment, education, med recs, and the documentation that already has many HH nurses at their computers until late in the evening. Not telling you about the staffing history doesn't exactly make you unable to do your job, but it sure seems their expectations do. The sales part is typical of census and profit minded HH orgs, which is all of them these days. They would ideally like to see you selling their services everywhere you go. As far as community work and networking, sounds lovely until you realize that's on top of an exhausting schedule. Bottom line, the fact that they are new at this may mean they have no idea what they are asking you to do. Honestly, I'd be more than a little concerned about my license, and unless I miss my guess this slow motion train wreck won't look especially good on your CV.
And just curious - if they have just cleaned house, who is providing services now? Who will orient you to the very extensive and convoluted documentation and requirements? What is your expected caseload? I'll bet if you posted this to the home health forum they would tell you to run like Forrest Gump.