Somebody created a Facebook like UI for Friendica called Bookface (expand for pics&more info)
Credits go to @kmh for creating this style. It comes in both a light and dark version (check the links for usage instructions).
If you don't want to fiddle with code and stuff, loma.ml has already installed it server-wide*, and should be available straight away for new accounts (If not, go to Settings>Display>General Theme Settings and change it from there. Or follow the guide in any of the links above).
Edit: loma seems to require invites. But, while in german, joinfriendica.de allows you to join without an invite. It also has quite a bunch of add-ons too like bluesky, tumblr, ifttt, markdown, langfilter (filters the languages in posts/comments) and curweather (shows the current weather).
Just don’t follow much on Friendica due to a lack of iOS app. And only had one for android. For it to really take off, we need app development as well. This is a great step though as an easy UI will promote use.
Most people like to have the phone app for socials, makes it easy to browse or keep on top of posts more convenient. Honestly, I can’t really think of any social media platform that isn’t app based for this very reason. Goals for success: make it easy to use, engaging, and have an app with a good UI.