The songwriter was formerly known as Jay Jay Pistolet and had associations with Laura Marling, Mumford and Sons and Frank Turner.
Of his shift in musical direction, Young told BBC Newsbeat: "It certainly wasn't calculated. I really hit a brick wall with it creatively. It just became secondary in my life and it wasn't consuming me as it once had.
"And then if I'm being completely honest, professionally I'd seen my friends pass me and I guess I became quite disillusioned. I just wanted a fresh start, really, a clean slate."
He added: "I think it takes balls to make simple music. I think it's harder to write a really simple, familiar pop song than it is to create some three-dimensional symphony.
"I don't like pop without any depth or integrity. Hopefully people will see that there's slightly more to a Vaccines lyric than a Fratellis lyric or something like that. I'd like to think there's slightly more depth to us than that."
The Vaccines release their debut album What Did You Expect From The Vaccines? on March 21.