It's a point worth making, I think, since there appears to be a general feeling that Bioware's writing has been steadily receding in quality since some high point in the aughties (KOTOR? ME1?). ME1 had very good writing for a space opera game when it released; it has loads of clunky dialogue, though. On a line-by-line basis, KOTOR is outright badly written and delivered by modern standards. Both ME1 and KOTOR, for instance, have some shit-tier villain dialogue, of the "explain my plans and then cackle madly" variety (I'm pretty sure this literally happens in KOTOR at some point).
That said, I think that what has happened is that the rest of the industry got its act together with writing and dialogue, at least a little, meaning that what was exceptional in 2007 is only adequate now, and perhaps less than adequate for a game in which dialogue plays a huge role. From my own experience with their games, what has happened with Bioware is that their writing hasn't kept up with the evolving marketplace - and the writing was the one thing they did better than their competitors in the first place.
(Incidentally, I haven't played enough of ME:A to have a meaningful opinion of it, but I certainly noted some awkward dialogue & delivery in the parts of the early access that I sampled.)