Because every ability doesn't have to be in every faction. Brave needs some work but so do a lot of units in the game. I don't understand making such a fuss over not having one ability.
We have defiler knight but he's probably the worst rune of FW atm which is pretty sad because of his amazing art. So we don't have a Quest Kill enemy either.. No problem..
I get that every ability doesn't need to be in every faction, Neb, but considering it had the ability, there was no sense in taking it off, especially since he's in a bad state.
Knights were released with this quest being part of their design. Every single one except for SP's has it now which is just weird, regardless of how good any of them are. That's like saying that every harb doesn't need to have initiative...not every faction needs initiative.