Flexible permissions with granular control levels

Current Situation: Users for a single client can only be allocated ONE role. The only way to currently give the same user another role is to have them log in with a new email address and assign them a new role permissions.

Brilliant Request! - Can companies have the option to change the permissions of a user with greater GRANULAR Control - such as being able to switch on permissions for an Editor role to start, edit and finalise payruns, view HMRC Notices tab, in fact, the ability to switch on and off permissions if required, and whether those permissions for that user level can allow them to save/update information or not, and possible, even if for a given time period.