I actually feel like you are buying high on Hartnell and not getting enough value for Kopitar. I don't value big PIM/Hits as much as more offensive multiple category contributors, especially in a H2H league. Also, context is important and since Kopitar is one of your best players, I would not trade him for that package. That being said, if you want Hartnell I would rather you offer Kessel instead and move Neal over to RW if he has that eligibility. That current offer is not enough IMO.
All I've got...all I've got is insane!