I am not familiar with the handling of the CL604, but am reasonably familiar with it's younger sibling, the CL350.
The human factor elements definitely contributed to it.
The Chally 350 will drop a wing if you put in too much rudder. I daresay it's a similar set up on the CL604. It can catch out folks. I think he probably over rotated a smidge thus letting it float down the runway. It is a very slippery wing and needs some attention to the flare - or rather - check.