I don't understand something. IIRC, the supposed leak mentioned that we're going to Andromeda to find a new planet for humans--specifically. But why would we need to go all the way to Andromeda for that?
I could understand if it was just to go and explore. See what's there. But the leak makes it sound like this trip is not just exploration for exploration's sake.
I could have imagined that a worm hole opens up due to the Crucible firing. And perhaps some ships got caught up in it at that point. And ended up in Andromeda, But the leak sounds like much more of an organized endeavor.
Personally, I would have liked to have seen the ramifications of the Reaper war on the Milky Way. Even disregarding state of the galaxies choices, the Milky Way got battered very badly. It would have been interesting to me to see how that changed the MEU as I knew it.
However, I'm okay with going off to Andromeda, too. Mainly because it's unknown. There's no one there to fall back on, either. No Council, no Alliance, no allies. Just you. And you have no idea how things work there; who are the good/bad guys; who is at war with who--and why? Truly, a stranger in a strange land. It makes me feel a certain sense of discovery again.
And the idea that we may be cut off from the Milky Way makes it feel more urgent, and a bit dangerous.