A draft of the proposals was presented to the NICE Board in January, and as such, is available within the Board papers here (Item 4 is the one you’re after). This may, or may not be, the version that will go out to consultation.
In short, burden of illness is in, wider social impact (not costs) are in and process utility is in. Definitions and details are in the papers, including the proposed changes to the methods guide. How it will be operationalised is less clear.