The problem is that changing to 6 pixels per character rather than 5 would result in the character count dropping from 16 to 13, or the size of each pixel (and therefore the size of the text) reducing.
I personally don’t care either way, as I don’t use the widget, but I would guess that some existing users wouldn’t be too happy.
There are obviously alternatives widgets such as Terminal or Labelled Value (my personal choice on most situations), plus I believe there are other widgets in the pipeline that will improve choices for text display.
You could submit a proposal for modifying the existing widget here:
Pete.