A CMS Page contains of sections, blocks and elements. Shopware offers only 2 different sections (sidebar/content and content).
Blocks can easily be moved between sections and within sections - making editing a breeze.

Sections only with 2 columns sidebar/content and 1 column content are not enough.
Many plugins add columns to blocks, but moving content between blocks is not possible. We loose the strong feature of moving blocks with text or images between sections.

Solution: add at least one additional section with 3 equal columns.

Thus making moving blocks and editing much easier.