Has there? Inquisition was released after they were supposed to be clued into this, and yet here were are again. After the ME trilogy, DA2 and DA:O's cinematic trailers it is still not time to have a more gender balanced trailer spread, even with the focus on ambiguous protagonist. We've gained a helmet for the man on the box.
Well we went from, even people who played the game didn't know there was a female character (ME1) to a couple of advertisements with a female character (ME3) to game play videos and reviewer screenshots with a female character (DA:I)
Even if we just take the DA series, there was little to no info on the female Warden or Hawke but for DA:I we've had game play videos, review screen shots, gender neutral box art and the first announced VA be for lady Inquisitor.
While I agree that for casual players it would be great to have some trailers, if they watched E3 then they saw a female Inquisitor and if they read some of the reviews then they'll see a female Inquisitor, which is more than we can say for the female Warden and Lady Hawke.
I'd say that there has been an overall improvement with the effort that BioWare themselves have gone to in letting people know that Lady Inquisitor exists, even if that improvement has yet to be matched by EA's Marketing Team.