It would also be invaluable if our doxygen docs included our global functions / properties, like wfMessage() for example. I hate having to dig into the code for what should be documented (and usually isn't in Manual:)
At the very least if you turned on doc undoc'ed stuff (and we should!), it would give us the names of the functions (the plethora of wfMsg functions and their arguments).
This would be a great start.
It would also allow you to include documentation on new Class based alternatives/replacements (pointing users in the right direction) and mark things as deprecated.
Since our Manual: reference is such a disaster this could become better documented and could one-day supplant it.