Cakram should be in the files I'll double check. Odd that it's missing though I'll agree.
This is more of a non-gladiator buff to daggers; part of Dstyle in ijji was its evasiveness; take that away with anti-lead and you have a sword without block. Coupled with daggers needing to be lead more... if you try any of the ijji-era Dstyle techniques, they will not work as effectively. Most of the times they won't work at all, unless you can match shots one for one. Doing so is incredibly frustrating as a Dstyler as opposed to a Kstyler. The intention is to coax daggers into a more support position with their stabs 'flinching' other players as opposed to a tank with block (swords/dachis).
The buff to Dual Kodachis is moreso to keep them in line with swords - with the lessened block animation, you can do an extra slash and can qbf with them. (I'm sure our gladiators can penta-butterfly with them, but it'd be kind of hard). The intention is to put them in a more offensive position in terms of locking the opponent in gunplay, and to keep them slightly faster than Swords in Gladiator.