Mortal Man, the song is some next level story telling and will go down as a classic.
It may not be as impressive lyrically as Mural as far as technique and rhyming but it's a more touching song and would connect with more people.
One song that Kendrick went Ape shyt on that also comes to mind is
Look Out For Detox but Mural is in a lane all it's own.
On another note, who really wants to do that much rapping on a song anyway. I'm a big Lupe fan and could appreciate it but if I'm a rapper I'm not doing that much rapping on a fukking song

Number one, it won't connect to that many people. Number two, most people don't have that level of attention span now a days to appreciate a song like that. With that said, Kendrick probably could do a Mural level song but why would he? Leave that lane for the rappity rappers.