"While I respect what Bioware is trying to do on paper, in practice, this seems somewhat problematic. If similar relationships had been featured in ME 1 & 2, it would have made sense for Bioware to continue to focus their resources on developing the established romantic interests. As it stands however, Bioware seems poised to repeat one of the blunders of Dragon Age II: giving the player the illusion of choice by creating a cut & paste romance for both straight and gay players (near-identical dialogue). The bigger issue here, however, would be a narrative one. In the first two games, playing as a male Shepard left you the option of choosing from several female love interests. As such, it would be highly unusual for Shepard to undergo such a rapid, inexplicable change in sexual orientation. In short, it would be completely inconsistent with Shepard's characterization up to that point. Of course, all of this presumes that someone accessed this content by pursuing a gay relationship with one of the characters.
I personally thought it was an unusual decision to make every relationship straight/gay in Dragon Age II. While it definitely cut costs by removing the need for additional relationships (something Bioware themselves admitted in an interview), it seemed to arbitrarily mold characters to the player's preference, becoming an exercise in wish fulfillment instead of embracing a sense of realism (i.e. giving the characters a well-defined sexual identity). To cite an example, many gay gamers were disappointed when they tried to woo Jack in Mass Effect 2 only to be met with rejection. While many complained, it challenged stereotypes of tough, somewhat 'butch' women being lesbians and created a nuanced, vulnerable character that defied player expectations. True to life, not all men and women are bisexual, why should characters in video games be any different? If Bioware truly sought to provide a game experience that satisfied all gamers, regardless of their sexual orientation, they would give all of their characters distinct identities--not only would their characterizations be more consistent, but they would provide tailor-made experiences for both straight and gay gamers." -a quote I happen to agree with from someone on IGN.