That's because the problem is not health. People try to justify their (not as pleasant as the beta, in most cases) experience by trying to find an explanation, but it doesn't mean their conclusion is correct.
I would, for instance, put most of the blame on weapon handling: too much recoil, too little accuracy. If your shots are accurate, the opponent dies in no time (health seems too low). If they are not, it takes ages to kill anyone (health seems too high). In both cases, it doesn't feel very satisfying, it feels like you're fighting *something* while playing, which diminishes the overall enjoyment.
Of course, without knowing exactly what was changed, it's hard to tell.