The Rifle and Other WeaponsAs noted the rifle appears to have way more kills than pickups. This is due to the rifle being a weapon when spawning. In addition the player gets a set of grenades. And indeed the hawk mech comes with swarm missles.
While I can normailze the graph (approximately) for these spawned weapons, I cannot do the same for the hawk weapons. The resulting graph is:
So there's a couple of things to note. First, as I said above the swarm stat is biased and should not be trusted. Second, the rifle drops in effectivness when compared to the previous graphs. This is because you spawn with it, so I've counted every kill as a pickup. The same with the grenade which is now in the sub 1% range.
What I don't have is how effective each weapon has been in total. For example, I often use up my grenades on structures instead of people. Also combination attacks are not taken into account (for example attacking with a rocket launcher to finish the player off with a rifle). As a result these stats should be taken with a nice helping of salt.
The source for these numbers comes from the Lighbox Interactive StarHawk Beta News page