I find it difficult to review edits when the prose is displayed is narrow columns:
It would make it so much easier if the width of the allowed space could be used for the actual review, instead of having 1/3 of the screen allocated to review options. Something like this:
It may not matter much for sites where there's not a lot of code blocks, but for Stack OverFlow, the narrow columns forces a lot of scrolling. Both horizontal and vertical scrolling.
This is my entire screen: