But many of this problems are actually resolved in ME3. For example, even in an hypothetical ME4 set on MW, the Geth/Rannoch plot will be resolved on way or another.
But I'm saying there isn't much to them after that's resolved.
It's boring. What are they gonna be? What's their culture and general traits exactly? The "engineer" race, where all of them are nerds and techies? Or is there more to them? Their charm has always been tied to their nomadic existence, the flotilla, and AI issues. There's a richness to all of that, but as a race by themselves..without that drama.. there isn't much there.
Same with the Krogan when you strip away their struggles..and the specific conflict they had with the Council.