First, woah, you actually managed to work out how they calculated that DPS value. I've been trying to figure out exactly what it was doing for ages! I ran through the math with a few weapons and it seems to match up with the in game values (with some minor rounding issues that easily could be me or the game). Great work.
That said, I think your conclusion about the Actual DPS might be misleading, in that it doesn't take into account the melee verb system implemented in Version/1.1.2610 and so won't be the actual DPS of the pawn. My understanding is that weighting isn't based on the square of the damage anymore (if it ever was), but on categorization of the attacks as described here. Which ultimately would mean that the listed DPS given by the game is more a guideline than anything actually descriptive of how the combat works.
If I'm misunderstanding how the verb system works, I'd love to know though. And either way the listed DPS calcs are really valuable to finally have. (Seriously, great work) But the actual DPS might be different still.