So far we've learned about the lol "Enhances QD" on feet, but what about this other bonus?
I'm a bit confused as to why you think its "lol."
The bonus on the feet is excellent.
My only fear is the set effect (like most sets) won't be an increase over a patchwork set of best pieces per slot. But I guess we will have to wait and see. I personally haven't seen any COR on Siren with +2 armour let alone 2-3 pieces
All of the AF3+2 set bonuses increase for each piece you have equipped after the first (like Campaign sets). You don't need the whole set equipped for the bonus.
Considering how incredibly, stupidly powerful BRD's set effect is, this better be great. Like actually inflicting the status effects the quick draw enhances, with quickdraw itself. Or making quickdraw inflict chainbound as if it was a ws of that element. If BRD's set makes carol II's 100% magic negation, quick draw better bring down satellites.
The strength of the BRD set is almost certainly unintentional, since none of the others are anywhere near that powerful.