I think it would help the community to limit which questions an "expert" can answer (whatever the value, figure you're an "expert" if you have 10k reputation).
Dont get me wrong, if something goes unanswered for a day then open it up to all. However I think it would help overall by forcing the top ranked people to answer harder/older unanswered questions in order to get points, while also giving some extra time to let some intermediate coders answer the easier ones to help get their reputation up.
If this was implemented it may also need a separate settings to denote the question as "easy". Possibly be tied directly to the asker's reputation. Meaning if they are new then their questions are labelled as "easy" and are witheld from "experts" for one day.