I don't have official details on why it was removed, but if I had to guess, it's most likely due to the amount of utility defenders have. Attackers have to expend a lot of their own utility to get rid of Evil Eyes, bulletproof cams, shields, Banshees and avoid/burn ADS'/MAG-Nets, so having one less shield at the defender's disposal that they can repurpose elsewhere helps a lot.
devtrackers.gg