I would say Lupe is Picasso. He knows how to paint realistic shyt, he just chose not to.
He instead paint abstract (cus its more fun for him). And for the regular viewer (in Lupes case, listener) it might seam random and even easy to duplicate.
But its layers to it. And a method. For example Picasso's Bull painting. If you had seen just the end result you might just shrug at it.
K-rino on the other hand, while he is an artist and truly a skilled one. He paints with the same style and pallet over and over again.
He is like a renaissance painter. Painting with much detail and skill. But have you ever been to a museum like the Louvre and visited to renaissance sections? Hall after hall with the same motive and same colors.
It becomes boring as fukk. You look and say, yeah thats cool. But it was just the first two three paintings that really grabbed you. Then its just "noise".
While Lupe paints abstract and let the fan decide what he wants the song to be about. Which makes it fun rather then boring as you claim.
But as I said earlier. Just because he paints abstract don't mean he actually have a own message in his head while his painting (making the song).
So just because the rhymes don't seam to follow the same story to you, doesn't mean its not there.
Sure Mural is maybe just a super abstract song with no meaning. But it seam that way because no one have been able to decipher it yet.
And there are songs on the album that is not "all" puzzle rap. Deliver is pretty straight forward but still filled with double meanings, wordplay and layered metaphors while fitting the bigger picture of the album.