Visuals in El Capitan

I’m not the first to say that in Yosemite this entry field looks like a button, but since in El Cap made the buttons more like buttons, it’s even worse. Mind you, I was fine with Yosemite, but I feel the next iteration is a step backward. In El Cap there is a subtle gradient, and the visuals had been changed also – to be even more like buttons. I don’t understand why. Why fix something that wasn’t broken?