Hmm the Chantry is still homophobic in a way. Even tho they dont do propaganda against it, its quite clear that Mother Giselle doesnt want you flirting with Dorian. And while she uses the "he's a magister who could be taking advantage of you" perspective you can clearly see that what matters to her is what the public opinion (and hers) thinks of the Inquisitor having a relationship with Dorian, and how that could affect how the masses see the Herald.
I've been fooling around with both Cass (she is so adorable behind all that hard shell) and Dorian, but when mother Giselle came to me with "concerns" about Dorian, it just made my mind up, I'll leave Cass romance to another playthrough, now i wanna see how far this Chantry concerns go.
And please stop making every dialogue option into an ultrasecret bioware agenda. They try to give you as much freedom as they can to pursue whatever kinda of romantic relationship you want to follow and they try to make it as believable as possible without stepping in anyones toes, but the bit**** of this world always have to find a way to see Bioware trying to form an agenda that goes against what such bit**** believe to be true and righteous. Get off your high horses people. The options are there but you dont have to take them. If you dont fancy them or are scared of them, just stay away and play inside your comfort zone, nothing in the games pushes you to do anything that you dont want to do, and you have plenty of options to make every kind of person semi-satisfied.