I'm withholding judgment until I actually play, because I suppose it's possible that whatever solution they come up with, even if it's not playersexuality, will make everybody happy. It would be a lot of work, and I'd be surprised if it can be pulled off, but who knows.
What I'm concerned about, selfishly, right now, is how openly bisexual and lesbian/gay characters are portrayed. If/when they are featured, and their sexuality becomes a part of the story, whether in a romance or otherwise, I'd really like to see thoughtful and diverse portrayals, otherwise, personally, I'd rather not see them at all. And while I've spoken before about being skeptical of stereotypes being repeated (see: promiscuous, untrustworthy bisexuals, tragic doomed lesbians, etc.), there are always going to be some things about lesbian and gay relationships that are relatable and realistic, that can be easily missed or ignored by writers who aren't familiar with the reality of LGBT lives. And frankly, I'm not that concerned about straight players who want gay pals, or who fetishize homosexual relationships. So please, Bioware, if you're not going with playersexuality, and you're being genuine about wanting to represent LGBT romances in a realistic manner, do your research, get outside opinions, and don't pat yourselves on the back prematurely because straight players are cool with whatever you come up with.
As much as I enjoy Bioware games, and the characters, I haven't always loved the romances, and there were times I've been pretty vocal about my disdain for the female romance options. I didn't "get" the big deal over romances for a long time (I've been playing Bioware games and posting on these forums since the BG2 forum was moved from Interplay's site to Bioware's, to give you an idea), and when I did hop on the bandwagon, it was a heterosexual romance that I was fangirling over. I like both Isabela and Leliana's romances with a female character, but I'd LOVE a f/f romance that was tied to the main plot of the game even more, like Morrigan, Alistair or Anders were. My favorite moment of DA2 was standing up to the Arishok on behalf of Isabela, and it struck me that I had never felt like my character was the hero saving her lady love in a video game before that moment. And frankly, if we don't have playersexual romances, I worry that I won't get that ever again.