[Chaos]

I don't think it's debatable. Unarmored fits with so many skills and possesses so many good selections that it's not even a drawback for a Legs item that grants Physical DR. Heavy Armor gets one skill and then proceeds to cancel out at least three other (solid) skills, and has a more limited selection for anyone that isn't a Dullahan. Stack that on how neglible Heavy Armor's main stat (see: Armor Defense) is, and a Heavy Armor requirement becomes a drawback.

Armor imbalance aside, at the least, you're looking at Ogatas performing on-par with Indomitable without being limited to only bulk-toting Black Knights. This applies doubly for evasive builds. I do not see why evasive builds should be getting the same level of passive, slap-on-and-forget physical DR that a tank class should get.