@Vholumvax I am not sure what all the complaints are about knock down shields. I find them very useful every day. When it doesnt work is most likely the player may be in trouble lost shields and needs to quickly shield swap. Since this season started i could not tell you how many times the knock down shield saved my butt. Even allowed me to come back with gold armor half way healed for the win.
When its not useful is when you keep popping it and letting go for the enemy to see what type knock down shield they have and if its a easy thirst that is worth it or just keep shooting the enemy. This is why i crawl to a saver area to revive myself 90% of the time. Or even allowing me be revived from team once im in cover. If you stay in the fight knocked then its wrong.