It is possible for us to import them, but they lack skills to actually utilize them as intended.
Back in Live, when Knuckles first came out, I made due simply because of my high Will already, using the basic melee skills, after all, you can use all of them with Knuckles including Assault Slash.
Making them usable like Blunt Weapons (Running them off Blunt Mastery and STR) is also fine with me, heck even if Tumble isnt brought in I'd still use them because again, they had their own little changed to the basic skills like the faster charging counterattack for more stamina, and the shortened windmill range.