I'm wondering why you have the tabs at the top, above create assessment? The lists would not be available until assessments are created so the placement of the tabs should be below the create section.
On my end, I put together some mockups (attached: SAMigoMainPagePublishedCopies.gif and SAMigoMainPageWorkingCopies.gif) and ran them by a few of our end users as well as our User Experience team. Attached is a redesign proposal based on their collective feedback and optimized for the most likely usage scenarios.
What's new with this mockup:
-to de-clutter UI when there are many assessments
-to help alleviate some confusion with existing labeling
-'New Assessements' renamed to 'Create and Assessment'
-The 2 create options are made more visually distinct
-'Pending' renamed to 'Working Copies' and 'Published' to 'Published Copies.'
-Under 'Published Copies,'
-present users option to view all assessments as well as ability to view just Active or Inactive ones.
-provide more accurate labels of what Active and Inactive mean
-introduce a 'Status' column that allows users to see at a glance Active vs. Inactive assessments since default view is view all.
-Default view when user clicks on tool
-After user publishes an assessment, redraw page and make Published Copies the active tab so users could see where the published copy has landed.
-Default view is 'All'
-Primary sort is 'Status' whereby all 'Active' assessments would appear on top of list
The visual design is not finished but I wanted to give you feedback on the proposed revised layout and interaction changes.
BTW, the mockups are based on the Stanford's local implementation of Sakai and we refer to 'assessments' as 'assignments'.