Yo! Good to see another puppy player around here. Blood claws are still good but I'd probably try to model out the plasma, they don't shoot particularly well and you want them in combat rather than sat still shooting. Same with the swiftclaws and skyclaws really, lots of melee, no shooting, that's where they shine. Powerfists are great with the SW +1 to hit on the charge.
As for the rest I'd look at running some wolf guard leaders in your squads so you can control where the mad guys go. If you want to add another dread Murderclaw is a great addition. In your list I'd make Bjorn your warlord so he gives a 9" bubble of reroll 1s. You also need another troops choice to make a battalion.