Just so I’m clear what you’re waiting to have fixed; you want to be able to see a list of all extensions currently published, sorted by date? Are you really just looking to see what’s new on Extension Warehouse?
It is a standard feature that has been present for many years. It also happens to be one I frequent in order to keep up with the latest releases, either brand new extensions on the warehouse or ones that have been updated.
Not all extensions come with a built-in function to call home and check in to see if you’re running the latest version.
Can you suggest any other method by which one can tell what the latest releases and updates are?
For extensions from the Extension Warehouse, open the Extension Manager window, click on the manage tab and scroll down to see if there’s any that have the update button highlighted. I think SketchUp actually notifies you when there’s an update available now.
Seeing a list of recently added extensions would be very handy though.