No MLB pitcher is going to throw a pitch with his finger up. There's no way, unless you can show me a picture of them doing this, you're completely wrong.
You can also quit being a condescending cocksucker. Last time I checked, he's just started using it more now. I'm pretty sure there are a lot of pitchers who have experimented for a while, just because you throw a changeup during BP doesn't mean you've been throwing it for years.