Ubuntu ships by default LibreOffice, a powerful full-fledged office suite that incorporates a wide range of functionalities, features, tools, etc, bundle of functionalities constantly developed by a massive group of developers.
Since its implementation in Ubuntu, users, across the web, have generated complains related to LibreOffice's look, mainly in expression similar to "LibreOffice is great, powerful, fast, yet its look must be aligned with its features".