Nope. Ain't played it yet.
Not sure how much mileage I'd get out of that, given its campaign is said to be only around 3-5 hours. Though, it does sounds like a lot of the fun of the game is being in the game-world online & fighting other players (so you also can learn their skills).
I guess, if anything, given the crazy amount of options and ways you could build out your combat deck - that could be a way to boost replay-ability, until the game brings its 3v3 mode. Hopefully, they do add more content than just *that*.
EDIT:
There's more to ME1-3 (especially) and even ME:A than just *that*. What you're describing there is more of a plot & summary here, not an actual story (provided by the developers) w/ some actual development. Mind you, ME:A isn't that great at this stuff, but it isn't a total blank slate either. It's just...not on the Edmonton level of greatness, TBH; not even bloody close.
In ME:A, you're actually also colonizing planets from scratch, too....besides the typical saving the world from an alien species trope.
Though, in terms of story development, character stuff, writing, narrative, and actual prose - it's probably going to be almost impossible to top Planescape: Torment. They don't really make games in that style anymore, TBH.