The biggest advantage of Scavenger is its prereqs: Eagle Eye, Intuition, and Whizkid. Those three traits are better than some master traits, all on their own. Scavenger itself is a little underwhelming.
It's been hinted at that Intuition and Whizkid may be receiving nerfs soon (Whizkid already had been nerfed a bit by some of the Assembly changes). If they do, Scavenger will need a buff, but as it is, it's fine.