The benefit of working with tables is their tabular structure. This allows you to visually compare data among rows. However, in editor mode, the table rows are not visually aligned, erasing a huge benefit of tables. Manually spacing out tables is untenable as a table grows in size.
I know vim has a few markdown plugins too, and one of them does the same, as you typed it aligns all | correctly so that the table is always readable in editor mode.
And I second this, it would be great (I don’t use tables so often but when I do, it’s a bit painful)
I just created an account to help bumping this point. This would be huge IMO. I use a lot of tables and being able to just press two buttons and have them “prettified” would be a fantastic feature. Even iA Writer has that!