I'm incredulous that one of the goals of the redesign was to make more powerful themes. New-style themes are much, much less powerful than the old-style themes

I'm incredulous that one of the goals of the redesign was to make more powerful themes. New-style themes are much, much less powerful than the old-style themes - cf. the new Terminal theme, which can't even change the text color or font, but is rather a hollow shell of itself with a small gif of a blinking green cursor in the upper left corner the only remnant of its old self. A preview of the old page in my Opera speed dial is all that remains of my old green-on-black monospace friend; I have set it to never update. Incidentally, the new UI for video calls makes the 'end' button the same color as the background, and it is very difficult to see.