First idea. There are no RSS feeds anywhere on the site. Bulletins and Blogs both would especially benefit from having an RSS feed for each to subscribe to.
Second idea is a dedicated wallpaper section. There has been some nice computer wallpapers released through blog posts on Halo Waypoint, but after the redesign they became hidden because the old blog posts are gone. Thanks to the Internet Archive’s Wayback Machine, I was able to look up the old blog posts and find direct links to them. Still, I’d much rather see a wallpaper section of the site (with an accompanying RSS feed!) with all of the wallpapers that have been given out in one place and updated with any future ones as well.
Direct links to said hidden wallpapers:
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-5-guardians-concept_wallpaper-1920x1080-53cf9b0098ea45ada37dc0f66bc174f5.jpg
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-5-guardians-logo-wallpaper-1920x1080-494747ad3b064f718ba90d34c89c246e.jpg
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-5-guardians-visual-id-teaser-wallpaper-1920x1080-e6bb97b9563b44cbbb552bf8e3d2d9c6.jpg
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-master-chief-collection-wallpaper-1920x1080_arbiter-bc4d7900ea0444079f10da8460a5dd7c.jpg
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-master-chief-collection-wallpaper-1920x1080_nightfall-81649b5d4c014e84a59a52d777cfe697.jpg
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-master-chief-collection-wallpaper-1920x1080_visid-151b0cff3a3c444e819e40fec97d4d06.jpg
https://s3cmsassets.blob.core.windows.net/media/Default/web/news-and-blogs/screenshots/full-size/halo-master-chief-collection-wallpaper-1920x1080-ba6a1e3483ea49309b3fb8017857478f.jpg