Let's see, not only is RSS gone - for no reason, but (OMG) the tab overflow menu is completely broken! Whereas in Lion it (correctly) showed all open tabs, now the menu only shows tabs which are hidden.
Why this is a regression: now, when trying to find a tab, one must not only search the menu, but ALSO visually scan the tabs to the left.
Since the reason there is the overflow menu in the first place is an excess of tabs, the visible tabs are at a minimum size, giving them titles like "The Gn..." and "New Th..."; not only is searching for tabs now a more heavily visual exercise, with a NECESSARY and MANDATORY 90-degree scanning operation EACH AND EVERY TIME, but it's impossible to effectively know what the visible tabs actually are, ironically.
This worked perfectly fine in Lion. Way to take a huge, flaming step backwards for absolutely NO reason except someone had too much time on their hands.
Meanwhile, how is the soul-crushing lag in opening Safari with several windows with tabs open? As bad as it ever was. Way to prioritize there, junior developer in charge of the Safari project.
If it ain't broke, why fix it, Apple?!