It would be handy to have a markdown extension for easy tables. The Confluence one is quite pleasant:
||heading 1||heading 2||heading 3||
|cell A1|cell A2|cell A3|
|cell B1|cell B2|cell B3|
It also handles header columns:
||heading 1|col A1|col A2|col A3|
||heading 2|col B1|col B2|col B3|