It is very usefull if a cell merge is added. The cell merge should be in a form of collspan and rowspan. Example if a cell is empty, should be collspan. Or also ">" can be used to merge cell with the right cell. For rowspan "^" can be used to merge with the upper cell. Multiple merges needs to be allowed.
Can colspan and rowspan be added ?
Example markup can be seen here https://tiddlywiki.com/static/Tables%2520in%2520WikiText.html