freebords don't actually lock you in, they're hooked. I'm thinking of the ease and control you have. I was never a skater, so I don't fully understand how you can do hard turns and the like when you're not strapped in, so that is my weakness there. I still think it'd be cool.

I think the control of a freebord comes from the hooks in combination with the third wheels, not just the hooks. Having done a fair amount of downhill longboarding, I don't think having hooks on a longboard would give you any more control and would probably just make it easier for you to face plant. The control would still have to come from body positioning, legs, and weight distribution.