Someone at the OU pointed this out, and I thought it was worth fixing, but then I thought I should post here to make sure other people agree this is a good idea.
When you create an essay question in the quiz, you can set what size the input box should be, to give students a hint what sort of lenght answer you expect. For example:
The problem is when a teacher reviews the student's attemp (or the student reviews their own).
You no longer get the visual indication of how much input is/was expected.
I think this is an improvement. I hope other people agree.
(Note, this but only happened if you set 'Response format' to 'HTML editor'. There was no issue with 'Response format' 'Plain text'. So, this fix increases consistency.)
The tracker issue for this is MDL-68277.