Running away to the nearest galaxy with your tail between your legs certainly is cowardly though.
Duck-rabbit situation, I suppose. You think it's cowardly, I think it's out of preservation for what's already happened.
I don't think shouldering the challenge of building a new Galaxy from the ground up is "cowardly" at all, though.
They don't want to confront the endings which is understandable on some level (even if I don't think its a good idea overall) but at best this is going to just delay things, unless they plan on permanently moving the timeline to Andromeda, but everything that I've seen so far indicates that they want to keep as much as they can from the original games, hell even the Ark looks like the Citadel, they just want to avoid the baggage of the endings. So I don't believe that they have some new story that can only be told in another galaxy. And as for them not touching the endings out of respect for player choice, I would ask when has BioWare ever really cared about maintaining player choice for their settings, they've always changed things around significantly to suit a new entry into the series.
Sorry man, none of this disproves my post, not really accomplishing more than just railing on BioWare.
If they didn't care at all about maintaining any choice, they would have canonized every detail at the end of each game instead of bothering with either the major or minor differences.