The PWDM/365, the tabs are cross-linked and sort of hidden beneath each other as it is falling under main tabs only which is INCOMING, OUTGOING only, unlike with Eadocs (Bentley PWCM) for example, all necessary package types are displayed such as Submittals, RFI, Drawings, Correspondence, Minutes of Meeting, Dashboard, Transmittal, Daily Report, Generate Report, etc. That will be more easy and organized than receiving all documents under one tab which is Incoming. A filter will not much be helpful specially having a thousands of different types of submittals.
Sorry, we are not looking to change the UI structure at present.