Sometimes it is difficult to tell which bars of a Gantt chart are aligned with which tasks. The labels help of course, but to make the Gantt view easier to interpret, I think it would be useful to show the horizontal gridlines within the chart, so that you can more easily align the data in the spreadsheet with the bars in the chart.
Perhaps make the display of the horizontal and/or vertical gridlines in the Gantt chart an option via the Project Management settings.