The content editor embedded on pages by certain parts, such as the Weblog part or the Event Calendar part (there are likely others), no longer have:
a. The remove formatting button
b. The formatting tool dropdown to select the type of content for text, i.e. selecting between Paragraph, Heading1, Heading2, Heading3 formats etc. This is a regression from V2.9: when posting news articles, we used to have the headers set at a certain format, and now that formatting no longer exists.