Strikethrough lines to mark text deletions and text revisions use only one line width that cannot be changed. The lines can be difficult to spot, especially when a full page is viewed or when the line's color blends with the text's color or the font's stroke width and the line's width are similar. With newer monitors having higher resolutions or graphics processors providing finer lines, strikethrough lines can appear very differently from the editor's monitor to the reader's monitor. A viewer's vision limitations should also be considered.
Bottom line, allow strikethrough line width to be set to something higher than the current value. For text revisions, the accompanying insertion mark should also be larger.