The new categories and highlights are good improvements for the Welcome screen, While categories are self-explainatory. Highlghts, ways of search, and search results are not clear when users just have Welcome screen in the front of them. So, suggestions

1. Use and replace the current place holder text "Search in Examples..." (red arrow in the screenshot) as a way to tell people how to use search, e.g. that it is possible to use "tag:XYZ" to search for tags
2. Alternatively, add a longer text label (cyan rectangle in the screenshot) just below the text box for search with details for the prev. and the next points in this list 
3. Explain how results are sorted, IIRC, it is alphabetical, ATM, right? This is not clear ATM