Insert Line items – Format settings

The reason behind the ask is because Anaplan is not letting the model builder even to add dummy line items (Divider with None as a format) if the model exceeds the size as it takes the 'number' as default. I hope to resolve this concern, probably Anaplan can let the developer choose the format of the line item before adding it into a module.
Another suggestion would be while adding a line item, make 'None' as a default format. Let me know if I make any contradicting statements. May be someone can explain to me the background of the default 'Number' format. Because in most cases people ignore to turn off the summary which leads to an increase in Model size and impacting the performance of the model.
Thanks,
Kavin.