For me, It's hard to undo years of being familiar with the way a certain thing looks, especially when I still frequently go back to my production machine with Mavericks on it. An empty wi-fi bar of signal strength on Mavericks is "bolder" than a full bar on Yosemite.
For example: Image has Yosemite up top with full signal strength, Mavericks below with wi-fi on, but not connected to a network. Translucent menu bar is enabled on both.
Could you post the Yosemite one with wi-fi on but not connected to a network against the Mavericks one.