Yup, exactly what I was thinking. IMO you don't need to be a burner to be an effective forechecker if you are strong and smart like Pavelski, Toffoli, and Wennberg types. Hertl is a good example.
I also don't think skating speed and team speed are necessarily related; if you can connect a bunch of short and accurate passes, you can play fast without skating fast.
I'm not suggesting Halttunen has to be a burner, I'm saying he needs to get to NHL playing speed. It's a low bar, but he's significantly below it right now.