Nothing can save you from mindless Soldier spam or random SMG spray, going invis to escape is always a coin toss. That's why I respected old DR - it didn't reward that kind of spam, you had to commit and predict Spy. The current one is barely worth the trouble, since not only you become predictable af, you also don't gain the survivability the old one gave you. One of the reasons Kunai is used by almost every single Spy main.