"In most cases the recording date is superfluous to the recording and confusing at that."
As I use mine as a VCR replacement I find this info very helpful so have to disagree, the recording date is only un-necessary when copying tapes etc.
There are also differences in models as to how many characters will be displayed, The 5005 would only show 12, the 5004 shows 14 and a firmware change could allow more but that would be low priority. The other question is where do you stop? 20, 30, 41 characters, then people would want to be able to Change the font, the colour, left align and so on.
An option to display or not the fields Date/time/Duration/Mode would be helpful.
The VR format allows all this but its just down to Liteon to implement it.