Supplier lifecycle management-List of enhancements

Hi

I m having below business requirements and not sure whether there is already an existing ER ,else i will create for below

ER1-E-signatures during Approval actions
ER2-Flexible AME list(Add /remove approvers from the list)
ER3- Ability to return the Document(Supplier approval ) to previous person in the Approval Hierrachy or Reject button by any approver taking the approval process to previous approver
ER4- Sourcing AME for Sequential Approvers(Currently its parallel)
ER5- All responses of colloboration Team members and Supplier responses in one PDF output
ER6- Ability to remove Reject button(using Function security)