The "slow" weapons we have now like the sealed sword series and troika series, it's merely just slow attack speed.
What about weapons that require two hands, and you cannot wield shields with them?
I mean, you couldn't block and they would be slow, but they do great damage.
And maybe a Gatling gun or something that would require some winding up before it fires?
I think slow weapons should have fast attacks, but a long recovery time.
They're too clunky to use without some Attack Speed modifying stuff.