I don't think they can eliminate employee health care plans without paying pretty big fines. The ACA requires that they carry health insurance, seeing as though they are a "large employer".

I am fortunate that my wife is a Federal government employee and we are on her FEHB plan. It's what I had when I was full-time Reserves...but most non-government employee plans are not anywhere near as good. The LUS health care plans were just about as good as the FEHB plan, and only a little bit more expensive. The AA plans are about $200/month more expensive and not quite as good.