BLU to me would be more of a tanking class than DRK but that from what i picked up about BLU do like these ideas do seem pretty sweet.

Also don't forget even tho BLU is double Swords it would be curve swords, that way it would work with this system as well and leaves PLD with its normal long/short swords.

Keep up the gd work and i do hope to see BLU in this game really soon