You are out of your mind. "Unfocused" is the absolute LAST word I'd use to describe Zappa. Have you ever attempted to play some of his numbers on any instrument?
Better yet, have you ever tried to arrange some of his numbers for any instrument?
Echidna's Arf as a marching band drum feature, for example. One of these years I will finally finish Moggio for symphonic band...
I didn't say he was an unfocused composer or instrumentalist.
He was an unfocused artist.
There is a reason why one of his most popular albums is a triple disc collection entitled Shut Up And Play Yer Guitar - an album that consists entirely of his guitar solos removed from the context of his songs. And that reason is that a lot of people love his incredible guitar wizardry, but do not want to have to endure the other parts of his songs to get to them.
As an artist his approach was apparently to record literally any idea he had - whether it was a good idea or not. As a lyricist his approach was apparently to just say anything that popped into his head, unedited.
As a musician, he was peerless. As an artist, he wasn't.
All I need to do is point to Thing-Fish and rest my case.