I don't know what game you are playing but I found that in LOTS of situations when I got the three arrow dialogue choices I could make sarcastic remarks. i found variance in those responses. I don't know how you didn't. I suspect but don't actually know you are making an ASSUMPTION that they are "very generic in their tone" because there is little varriance in the paraphrase. I found that companions would comment on my sense of humour and these responses only came when i picked the "right" arrowed response as humourous responses are not part of the emotional response options.
The options are there in the game. If you are not finding them then it is as I said before, its not because you are not given the option its because the game isn't for you. You may have wanted the game to be for you but it isn't, for whatever reason. I am very easily able to create two characters with different personalities and I don't head canon. If a game doesn't resonate with you its not going to be enjoyable, but that doesn't mean that game has failed or is bad it just means the game isn't for you and thats okay because any given game can't be all things to all people.
Or maybe, we played the same game, and reached different conclusions! Doesn't that bottle the mind...
I am not saying there weren't options like sarcastic ones, just that they were all very bland. Generic.
In DA:O I could take my characters numerous directions. Dalish Nationalist. Mage Goodguy. Vengeful Dwarf Noble. ex-Carta Dwarven Wiseass. Just Plain Evil (<-- never played that way, myself, but it is possible to, and not so much in Inquisition).
In DA2, some of that great freedom was lost, but we could still give Hawke some clear personality and bring that character to life. What we got in Inquisition was basically the DA2 wheel but comparatively very watered-down. Your options were typically (from top, down) Diplomatic Lite, Sarcastic Lite, Aggressive Lite. Only when given the rare "reaction wheel" could you express more, which was also not always very expressive either, and sometimes it gave you reactions quite different than what you'd expected. In total, it's made for a PC who just feels altogether very plain, bland, generic without LARP'ing.