I used to easily see the questions which have not yet got any answer as they were displayed in a red circle until recently.
Now it's very hard to easily spot them, and I don't think the argument "too much orange color used in the website" can justify lack of a stronger emphasis for 0 answer questions. This problem, I think, will have an adverse effect on the overall number of answers as it puts off people who prefer focusing on unanswered questions.
I think it was a useful feature to draw attention to unanswered questions more than others already answered (accepted or not).
Perhaps it might be a good idea to bring that feature back.
For example, only the number 0 (without a circle) could be made red, or a light grey circle could be used, etc.