I really don't agree on the site feeling like a mess because of posts from other sites, in fact that's what sold me.
As soon as I made an account, I was browsing all (m/all?) and the top post was from a lemmy instance. When I realized that was the case I got overly excited and hyped about the future of fediverse.
I think having access to all the content so easily is a huge step into beating reddit and moving to an open web.