My suggestion for Knight
At the moment, imo, the only useful Guard during chase is The Assassin, meaning your power is only useful 1/3 of the time. I think it's during chases where I think the knight struggles despite having a power that's supposed to help with chases.
The Jailer is great at camping a regressing gen of CoB + Overcharge but lacks any usefulness outside in chases, I suggest that when the jailer spots someone, The Knight will receive killer instinct on the survivor. This would make the jailer an anti mind game guard instead of just a "well my power is down for 24 seconds" if you miss or the survivor holds W.
The Carnifex is only for breaking a pallet after downing someone and after hooking someone. I would suggest allowing ability power 2 to just send the guard to break the highlighted pallet/wall, instead of the 1-2 seconds needed to back up, go into power then use the power on the pallet. (This would only work with the carnifex else knight would just be a pallet shredder beast)
A different suggestion for the carnifex would be that using him on a gen would remove 5% off the gen. Right now I'd rather have the jailer break the gen for the 6 second gen block.
I know he's new and we all have a lot to learn about him but lets hope he doesn't disappear to the void like The Twins.