Malphite brutal strikes needs a duration increase and cleave range increase

I played Malphite a couple of times since the changes to his W and have come to the conclusion that the duration and possibly cleave radius are just too short to be effective. As a primary jungler, wouldn't it be prudent that his W promote better camp clear? I have found that 6 seconds is barely enough time to get 4 auto attacks off within the first 6 levels which are almost exclusively dedicated to clearing jungle. The W active radius of AOE damage application is so small that you cannot reliably hit the blue buff monster and the small ranged golems at the same time. I can understand why the active is so weak damage-wise, but please allow us to do more damage over time and to more targets. That ability has virtually no application in teamfights.