Why did Bioware do so little with the Yagh?

No one is more powerful than the Leviathan.  I think it's just their numbers, and their desire for the Reapers to succeed in their set goal, that stops them from taking over.  Seriously, they just need to spread those space balls all over the place and the Reapers instantly lose.

I have teeth.

That reminds me, I need to get me some new shoes.

Because the Yahg design was something out of Dragon Age Origins and it wasn't originally a concept when they came up with the Shadow Broker.

Yahgs are the closest thing next to Angarans being the most "un-mass-effect" like creature designs.

Their fucking cut-content level of art design. It's not good enough. It should have been scrapped for another iteration just like the Kett. These are the most uninspired alien designs in the entire series.

They're the most significant aspect of going to a new galaxy which is the attraction it has as a Mass Effect game.

Hardly. Apart from the fact that they're still bilaterally symmetric bipeds (aka vaguly humanoid), yahg are probably the most alien you get without going to really out there designs like rachni or Leviathans or synthetics.

Multiple eyes of varying visual properties, triangle mouths. They're still firmly in the rubber forehead alien camp but as far on the outskirts as you get. And I'm all for that.

Yes they made them monstrous so we can have a scary boss fight, but since people aren't expecting to get cuddly with them, that's not an issue.

I would say the yahg would've been the best bet for antagonists in a post ME3 setting. With everyone having to rebuild it's conceivable that the Yahg might find some tech and build up to be competitive. As for Leviathans, a) we've had enough of mind controlling cuttlefish menacing the whole galaxy and b) hopefully any post Reapers story doesn't have everyone going full retard, and either containing the Leviathans (which Control Reapers can do) or preemptively bombing the shit out of Despoina (Destroy).

Well to be honest why did BioWare do so little with so many of the Milky Way species? It was dominated by Asari, Salarians, Turians and Humans. The citadel in ME2 and ME3 was populated with just the four species. The Hanar, Drell, Elcor, Batarians, Yahg, Rachni, Volus, Quarians... they were crutches to support a main storyline. They were not fully integrated like the other four. Did any of you even know about the Raloi? They were discovered by citadel space and they were a spacefaring species. But not once were they mentioned outside the codex.


Was hoping the Raloi would be brought in during ME3 at some point in a surprise way to defeat the reapers

The Raloi were mentioned in a news message ingame at least. Though I had also hoped to see them.

How much were they built up?  One yagh, who had been taken from his home world rather than left of his own volition, became the Shadow Broker several years back.  There's no indication that he helped other yagh escape.  And then we got evidence that salarians were being stupid again by experimenting on dangerous aliens.  Hardly a build up.

Oh, I see.  I thought you meant in-game. Yes, you're right.  They could have gone with a "Hulk" character that's just the same human frame but larger.  Instead, they spent time making something different.  In that case, I had no idea why they abandoned it.  It wouldn't fit well in MEA (unless one surprisingly popped out of the cryo pod) so that might be the only answer.