Check out some of this footage. He is nailing Ray with some good shots and Ray is walkng right through them. Seems like SRL was having problems with a southpaw.
http://www.youtube.com/watch?v=iGX-Bi8uSQI
Whay if Kalule had more power? Ray was up five rounds to three before stopping him in the 9th round. Ray took a lot of shots this fight
It would be interesting to see Ray against a Southpaw with a little more speed and power.
If Kalule had more power, I'm sure Leonard would've adjusted to a more boxing-oriented style. He wanted to put on a show and knock Kalule out, which is why he fought in a more aggressive style. See Leonard-Hearns for how he fought against a puncher.
There were no question marks surrounding SRL's chin so more power would not have helped Kalule unless you're talking about the power from a higher weight and that would be plain dumb!