There are several things about the appearance of yosemite that I don't like, and I just started using it. Mainly the title bars of most applications are so blandly indistinguishable, when I want to click on a title bar and move a window, I often click on the wrong thing, often popping a different window to the top that I don't want...
Now when in Safari, I don't know where I am in within a site unless I click on the url box… Maybe there is a preference setting, so much to figure out.
As for your complaint, I think it is that you cannot see the complete descriptive title of the web page when several tabs are open. If you just place the mouse curser on the tab, and leave it there for a second or two (be patient!), the complete title appears in a pop up display box. If you move to another tab after that, usually the display box comes up without the 1-2 second delay. Usually, but not always. Usually, but not always? I'm still figuring some of this out. If you move on top the "x" close box, it eventually pops up an entirely different message, and sometimes when you get that, then it doesn't pop up the title even if you move off the box, you have to move completely off that tab and then back on again.
I've always hated the close box within the tab : When using tabs, if you want to view the web page that has a tab, then click on tab, EXCEPT don't click anywhere on the left part of the tab otherwise you might click on the previously invisible close box which then does the opposite of what you want, it closes the tab! It is a bit better in Firefox, but still bad design.
The descriptive title pop up thing worked in the old safari, at least in 6.2, also.
When only one tab is open, I'm not sure how to see the descriptive title at all, except go to the top menu bar and click on window, and look at what has the check mark? Time to experiment with preferences. Grrr.
