I sent some feedback to Apple:
The tabs at the top of the main safari window are too indistinguishable. They blend in too well.
I was recently faced with a draining MBP 15 battery due to a constant fan when I use Chrome. So I am forced to use more Safari. I like to keep a lot of tabs open.
The design of the tabs with the gray coloring and the blending of the tabs, without much clear distinction from one another that doesn't show favicons and only shows the same boring gray text on top of gray shadowing sucks.
My name is Dae Yu.