The "new contributor" feature sounds potentially useful. I'd find it more useful if it told me
Whether they've taken the tour (e.g., do they have the
Whether they've viewed the How to Ask page
Whether they've viewed the On Topic page
...so I can tailor my comments on questions that need improvement to suggest doing so if they haven't, and so I don't tell them to do so if they already have.
This will be particularly useful as, with September just around the corner, the number of new contributors will get a bump for a while...