See I am sad that they even had that amount of baggage that they had to leave it behind. Three games full of characters, lore and stories should not be "baggage" they should not be something that you cant wait to get rid off. They should be a foundation, a solid start for whatever comes next. And I am not happy with the fact that they even had to invent something like that to continue the game series in any possible way.
Look at this way - the trilogy from which so many people derived so much pleasure shall remain unspoiled and untouched by anything they might do in the future.
They allowed us to make decisions that would affect not only the entire galaxy, but the existence and future of several different species within that galaxy. In the end, they gave us a set of narrated slides with some vague ideas about what might happen next, and invited us to draw our own conclusions.
I don't know about you, but I expect I'll continue to play the trilogy from time to time for many years to come. So long as you have a compatible platform, the MEU trilogy will be there for you to enjoy. And you can do so knowing that your decisions and headcanon will not be overwritten by new material.
I understand a lot of people don't want to leave a world they've come to love, a world in which they've invested a great deal of time and emotion - but it's been said that you really can't go home. Those old familiar places people are anxious to revisit? They were all changed by the reaper invasion and ensuing war. They wouldn't - or shouldn't - be all that familiar anymore, anyway.
The world was established with histories and conflicts built-in. Bioware has told the stories they wanted to tell in that world, and addressed the major conflicts.
So - I guess I'm happy to know the trilogy is something I can continue to play and enjoy, and look forward to new adventures served up on a clean platter.