I've never played LIVE in SLB, so I don't know what that's like. But I do have an IT background so I know from first-hand experience that sometimes things that seem like they should be a very simple thing to clone to fit into something else don't always fit in as nicely and cleanly as you might expect. Subtle difference sometimes have very large ramifications.
Or maybe it's just a complete rewrite of what's in SLB.