If you don't say anything then it's your own fault if nothing changes.
Oh I'm not suggesting anyone be silent, but perhaps feedback would be more valuable after the game has been played, no?
I'm concerned the writers' have decided the focus on their female players when it comes to Romances. This, in and of itself, is fine and within their rights and maybe makes the best sense. But if, in doing so, less and less resources are allocated to something I do like in the game (female romances), then I should probably point out that I like the romances too.
This I certainly understand. However, in the non-expanded romance pool, everyone received two options. They built a careful web of options to give everyone an equal share. The lopsided balance we see now is a result of extra development time, and as you said, choosing to focus that extra time on the straight female Inquisitor isn't, in and of itself, wrong. The straight male quota had already been filled.
The straight male Inquisitor has the same two options from past games, only Inquisition is the "biggest Dragon Age Bioware has ever built." I think your interests are in good hands. Even if you can't get in touch with Cassandra's romantic side, Josephine is quite the contrast. And I'm sure Bioware have thought of ways to make her romance arc interesting even though she isn't a companion. These people are professionals.
"the complaints were minimal".
Complaints are a good way to get heard, but they're not a good way to talk. A lot of what I see is unfounded kneejerking. Minimal analysing reveals a plethora of potential content directed specifically at straight male Inquisitors.
I say Inquisitor, not player, because the distinction is relevant.