So does reactive armor not work like it did in BF3? It also kinda sucks that I no longer have any indication if it's still up or not, aside from going into 3rd person view.
Reactive now reduces the chance of critical hits by making the angle of impact that would cause critical hits narrower . Basically means an engineer needs to hit you at a perfect 90 degree angle to get a critical hit vs 90 degree +- 5 degree hit.