I'm not sure this is within the realms of the Funtoo dev's, but better conflict resolution for emerge would be a great start. One of the things putting me off Funtoo (and straight back to Devuan) was the issue that portage drops out the moment it encounters a conflict (like multiple packages for a slot, etc). For all its flaws, perceived or otherwise, apt has really good conflict and dependency resolution mechanisms build in. Now, I'm aware there's a different design philosophy behind emerge/portage against apt, but dropping a user back to the cli with a cryptic error message stating a conflict has occurred and masking a package may resolve it and effectively leaving a system in limbo while updating/upgrading is not a great way to experience Funtoo for less experienced users.
FYI: I've been using Linux as my daily OS since 2005 and experienced the "Dependency Hell" with Red Hat 8+9 and Suse (pre-Novell days), then I found Debian (Woody) and apt was such a relief. Stuck with Debian until systemd made it impossible (really-old Stable, IIRC Jessie) then eventually switched to Funtoo (2015) before finding Devuan a few years later (2018). Tried Funtoo again earlier this year, but still got issues with emerge/portage so now running Devuan once more. Thing is, I'm not smart enough to be a coder. If I were, I'd be a Funtoo dev for years. But as it is, my contributions are (severely) restricted to signalling something went wrong and that's pretty much it.
HTH!