Armorer states beskar is made for armor not weapons, Din states the dark saber is made of a beskar? I would omit the line of what it is made of, especially if later on you still plan to include moff crushing it.
This actually makes sense. The weapon on the darksaber is the lightsaber blade not it’s casing. She also states the reasoning is BC the spear can pierce beskar armour and when she breaks it down, it’s just the tip. The beskar on the Saber is, in a sense, acting as armour. It would stop other Saber opponents from cutting or breaking it easily.
In terms of Gideon crushing it, that still does make sense as he’s in an exo skeleton to increase his strength as well as all beskar armour himself. Although, I do think it was a poor decision to have him destroy the darksaber haha.