This would be the one single feature that IMHO keeps Piwik from standing out as a web analytics app:
On any table, the “Visits” count should always be clickable, linking to the Visitor log page, which would filter those specific visits only.
Use case: it is very useful to be able to carefully analyze what happened with visits that came to your site referred from a search engine with specific keyword searches. For example, if 3 visits came to my t-shirt selling site referred by Google after having searched for “buy red t-shirt”, I would like to know who those visits are, where they landed, what pace they followed, and how close to the goal of “buying” they actually got. I have not found any direct way of accessing those visits through the current Piwik interface.
For me, this is a BIG must.