Well, seems fair enough. I mean this IS the end of the trilogy, by this point they shouldn't be adding in new characters, they should be fleshing out the ones they already had.
The last thing Mass Effect 3 needs is eight more romances that last about five minutes in total dialogue each to distract from any potential character development from the cast we already have.
Frankly there's already:
Ashley
Kaidan
Miranda
Jacob
Tali
Garrus
Jack
Thane
Samara(?)
Kelly
And Liara.
What I'm saying is, if you haven't found your pick from the collection so far, you probably never will. There are over ten now, I think that's enough. I'd rather see work go into seeing them all get decent characterization and depth added to them then I would see another additional group join up and hog the spotlight.
I want to see a fully fleshed out reuinion and rekindling of the old spark that was once in the relationship between Commander Vrex Shepard and Ashley Williams. I want to see it develop in a well done and believable way, as they go from distanced to close again and return back to being lovers once more.
The kind of thing that could make the end of the trilogy have some real emotional weight.
(I might even like to see where the relationship between my other Shepard and Jack might go)
So yeah, I'm quite on board with this idea. I apologize to any newcomers who might feel like they are missing the whole story but this is my honest opinion of the whole situation.