A system wide dark mode would be great. A fluent design or acrylic theme I think would look wicked BECAUSE your image and video viewing already remind me of it. Your video viewer/wrapper, or whatever the proper term for it is, looks slick and cool with that dark acrylic like/similar material, BUT we got that white clashing with it. An acrylic white theme and black theme would look sick. If you could include the motion (don't know what it's technically called) where material lights up wherever you move your mouse like Windows 10 has then that would be aesthetically nice but also be a helpful visual aid.

HOW is one suppose to know about search.yahoo when it's hidden? Should not Yahoo have a clean homepage like Bing or Google? I don't like the Yahoo portal (too messy; I like MSN's news portal) so it would be nice to be able to quickly go to a clean homepage where I can get top news and interesting facts about the homepage picture. You could add a feature where you can ask a question from the homepage, and then you could get notifications from a notification hub when you get answers.

Web Portal:
Yahoo should give more attention to yahoo answers snippets in its web portal. "Is Russian an easy language to learn?" This question gives us a snippet but the snippet contains a hard to see border. The snippet should be like Bing's reddit feature where you can scroll through the top responses. You only get one answer on Yahoo. When mouse is over card then card should show depth animation for visual aid (like Bing does).

Search.Yahoo Homepage:
You could include the ability to ask questions via the search.yahoo homepage. Make the page scrollable like Bing and include the feature to ask on the homepage. OR... When one is typing a question in search box you could include a link at the end of the search query and when one clicks on link then it submits the question. Both would drive more traffic and usage to that area.

The News.search portal looks outdated and is weak.

The news section should have a continuous scrolling like Bing.

The News snippets should look like cards to add depth, and the cards material should be acrylic like the yahoo image and video viewer/wrapper. Include the ability of the card to light up when your mouse is over it like how Windows 10 does. You video viewer/wrapper is sort of like that, but it just lights up a card, which, still looks nice but being more like Fluent Design would aid users because it gives them visual cues.

The news snippets are small and aligned to the left, which looks awkward. Should be more fleshed out like Bing.

Their should be a dark mode throughout the web, image, video, and news portals. A light acrylic and dark acrylic theme would be great.