Noted is the distraction from automatically changing carousels. I've found this a major area of concern -- not just carousels but any autoplay content, automatic slides, and text marquees. And beyond distraction, these elements assume a specific pace of reading and require the user to build UI understanding to get back to interesting content they glimpsed in passing. If the content is compelling enough to display, it's compelling enough to present well.
(5800 sq km is 2239 sq mi. The land area of Delaware is 1949 sq mi per Wikipedia)