I'll cut the DR down to 4, and change it from being Durandium to Nerimium.
I'm not getting rid of the either the Chainsaw Part, or the Vibroblade Part, or the Heatsword part. That's for flavor, pure and simple. And i'm not changing anything else. All this feels like is a certain group of people ganging up on my submissions because they don't like what it contains, or because it's too fantastical for their interpretation of SARP. But that's just me ranting, with a slightly paranoid twinge combined with my stubbornness.
I'll change it, get rid of the chainsaw part, make it Nerimium, BUT, listening to Kai and Fred, keep it at MDR 5 to represent it being a highly specialised cutting device made to mission kill Yamataian PAs in one stroke, Nepleslian ones in 2, a light frame in 3, and a normal Frame in 4.