Quote Originally Posted by Shougun View Post
The Katana is not a load bearing weapon etc.
This has absolutely no impact in a fantasy video game. Nothing about Axes and Greatswords lend themselves to "tanking" anymore than any other weapon. If it's a "destroyer of lightly armored targets" then it would take a penalty against any enemy with hard skin or metal armor, now you have a DPS that does less damage against most enemies, congrats.

All tanks have parrying to a degree, and high defense. There is no problem having both DRK and SAM have skills that boost their parry or dodge. There is also no problem in having both DRK and SAM wield two handed swords (Alternatively SAM could dual wield a katana and wakizashi, making it unique.) Even then, the way DRK hold their sword is likely intentional, they hold it in a downward posture and this creates less animation similarities if they add a two handed katana like weapon which is typically held upward.