That's an interesting angle but it's not working really. He is not giving you any information you don't have. Moreover, he's giving you false information most o the time, and his insight isn't valuable since he was dead for the last 50 years. The theory would have more legs if he died 5 months ago. Then maybe. But Can you imagine that somebody who died in the 70s is serving you as a guide in the modern world? I know that in Cyberpunk the world didn't change that much (which I find strange) but technically V should be Johnny's guide, not the other way around.
That wasn't my experience. V warms up to Johnny despite my efforts. V doesn't;t question the main plot even if I really try. I already came to the conclusion that I'm not. the target audience of this game (apparently) since I can't find this connection. Sad but probably true. It's surprising because I haven't struggled so much to actually "feel" any protagonist in any other game before. From first fallouts to dragon age, mass effect, even Assasins, I could find myself somehow connected to the character even if I disagreed with them on certain things. With V... nothing.
To each their own
I'm happy that somebody likes it and the whole effort is appreciated by many
At least someone is happy with the casting