The EU Exit Order deals with only a few practical technicalities affecting EEA and Swiss citizens coming to the UK. There are no new revelations. It simply sets out the legal basis for certain developments.
The main takeaway point is that EEA and Swiss citizens will automatically be given permission to stay in the UK for a period of three months when they arrive in the country (unless a deportation or exclusion order has been made against them in the past). In other words, they will not have to apply for any kind of waiver or visa in advance of travel.