All my googling returned only information related to how to add additional right click features.
I swear somewhere I saw screenshots of MSS2010 being used where right clicking provided the menu to do various operations, versus having to use the ribbon, or worse that awful menu pictured here.

I was expecting this to all be drag drop… 🙁
I’m really disappointed with the lack of ajaxy-ness built into mss2010. I can’t believe every save/apply reloads the whole page.
SharePoint is a massive product. Microsoft appears to be adding and improving as much functionality as it can in each release.
A high priority of Microsoft for SharePoint 2010 was to redo the HTML for the end user pages. And it is much improved. The poorly formed, table heavy HTML of SharePoint 2007 now has more divs and unordered lists. However, you have stated that you do not like their design choices of the ribbon and full page refreshes. And you also do not like that UI improvements did not extend to system pages in the layouts directory.
SharePoint 2010 was released almost a year ago. Functionality changed during the beta, but it is unlikely that big changes will be introduced at this point. Your two best bets for getting your desired functionality are: