We need a codex!
I mean somewhere we can keep informations:
Mobility?
Finesse?
Scab?
Dreg?
The symbols on the weapons? (i mean in the armory not the eagle or the skulls)
We can even complete it when we kill the same ennemies:
for example
Scab Mauler:
some lore information (always nice to read)
after X kills: armoured on the head
after Y kills : strong against laser
after Z kills: weak to fire