That's exactly what we need to do. More specifically, we need to decouple the app web from the document web. Most of the value of the web to society lies in text, images, and video, in that order. We need a version of the web refocused around basic content with a spec simple enough for a small team to implement a browser for. A subset of HTML/CSS is probably the only way to succeed, since sites would need to work with current browsers. I think a few HTML tags + flexbox + fonts + colors would get you pretty far.