I agree with these two points. #2 (the obnoxious images on the front page, and "read more..." links after only 4 lines of text so I can't even read the summaries without clicking!) are bad, but the redesign for the comments section will very likely be bad for slashdot.
As I was browsing it, I realized that a single comment like the parent in the current format, that takes up less than a third of my browser viewport (so I can see the flow of conversation around it), takes up over two thirds in the beta format. I feel like "the medium is the message" applies here, or at least, the medium influences the message -- multi-paragraph comments are more common on slashdot than other sites, but if they want to discourage that kind of dialogue, this is a great way to do it.