There is definitely leg drive there.
To be fair a lot of the bigger benchers don't use much arch just because they are already MASSIVE. Arch is also only meant to be used to help so of course if it doesn't it is useless.
Personally I still think Henderson's 600lbs triple is the best I've seen. Massive control over the weight and he has a ring on, no wrist wraps or any of that, no belt or anything.