In the end, whether if it was due to inner conflicts, script leaks or who knows what else, I dont consider Mass Effect 3 to be a bad game at all; its good, borderline in great but is marred by a botched ending that fails to carry the themes and spirit of its two far superior previous installments...after a lot of thought, Ive come around on loving the series as a whole, and im not letting the endings controversy and failure to get in the way of my enjoyment of the series, its universe and its characters.
I will have no problem playing any future DLC if they make interesting additions and create engaging stories, like Shadow Broker, but i still think Bioware really needs to look at both the development, reception and reaction to ME3 and think hard about what direction they should go next.
As far as the Mass Effect universe is concerned, I believe Control (I want to be clear that i LOVE that Shepard dies in order to become a sort of Reaper Hive Mind, as it echoes Legion's sacrifice and bring the organics/synthetics theme to a close) is the ending that gives more space and ideas for a new trilogy; be it the benign reapers suddenly dissapearing, a threat from another galaxy arriving or even a return of the Reapers creators; in contrast, Synthesis limits the potential for conflict and new concepts to be introduced, and Destroy kind of leaves open a new Shepard adventure, which i think should not happen.
There's a lot of potential in both the ME and DA universes, but Bioware should be careful and really think over what direction it wants to go on with.