Gaia said
Okay so I'm curious, would you guys be willing to take on a Yahg that was part of a Salarian STG research project? If not I have other ideas, but I have been dying to play my Yahg character again.
Probably not. Although that is technically canon from ME3 (though I couldn't find a date for the research project or when the one yahg escaped), it'd be hard to pull off an argument for a yahg in the team. Yahgs are not allowed in Citadel space/to be dealt with in Citadel space, so Nova would have an extra reason to be gunned down off the bat if they took 'em in. That isn't a deal breaker on its own (we've got a few of those guys), but yahg are known to be both extremely intelligent, perceptive, and aggressive/murderous. The reason they got blocked from the space community is because they killed the Council delegation for acting as equals. It'd be a constant threat and danger to the team, especially since there's not much known about the yahg's psychology.
If you can make a really fantastic argument for it, maybe it'd work. But the yahg's mindset and temperament, combined with the fact they can be a serious risk, isn't genial to cooperation. Especially on a ship that's running a democracy.