False Prophets is certainly a diss on one level but it's also a general "damn nikka what happened to you" moment we all felt. That's not really something you can whip out against anyone but Kanye, who has fallen off (creatively, morally, mentally, etc) more than any major rapper has. That was more of a one-off that can't be effective against anyone else. Didn't stop him from kind of trying it on Kendrick and we all know how that ended, of course.
He needs to stay in his lane, which is technical raps and concepts. And if I was a noteworthy rapper I'd be taking shots at him, no question. Joey and Gibbs won't be the last to do it.