A lot of people think band tension only helps the top end of the range of motion, but in my experience the guys that do the most speed work are fastest off of their chest. Which if we follow Josh Bryant, is the name of the game. For me being a short ROM guy, this is especially true, but the longer ROM guys benefit from speed off of the chest and improved positioning on the way up.
The traditional way to attack lockout is best, don't get me wrong, but the two points I just mentioned have some play as well.
It was very interesting to see Mike Wolfe and Jeremy Hoornstra work up to 650 in person at the cage. There could not be two more opposite ways to go about it. You rarely see (never see?) Hoornstra do the traditional speed. He's light, and he's in very close. Then you have Wolfe weighing 385 with the maximum legal grip. Both through different methods are all about bottom end speed. Like, we're talking enough force to put whip into a Texas power bar. It was unearthly.