With that Collectors being more of a threat, yes, i feel they could've done a bit more with that. Have more Vorcha fucking shit up for the collectors, the collectors use them as pawns, and for the most part, they did Very Well.
They managed to kick the Blue suns up and down the slums despite the blue suns having better guns and armor in the first place while the vorcha have combat belts. I want to see more Vorcha. I know they're grubby little scavengers, but they're amusing. Give me like three vorcha sneaking their way into the cargo bay and just chilling there (There could be a Shanty Town! Shanty!), Let sheppard handle it, and lets us either A, go kill, B Vent The Hold!

or C, talk them into working for sheppard! I could always use some more good crewmen that arnt Cerb Pets, on the take, or insane. granted vorcha are a little, but they're like varren, with guns :3
And another good thing, the Vorcha could finnaly prove themselves as decent fighters by taking out the reaper probe, shep gets his team, gets to the cargo bay and, they're all standing atop a ripped to shreds orb.
I would like to see a Vorcha centric quest then lets us communicate with the Vorcha.
Hell, if i've taken out the Blood Pack Hirearchy, who leads now?