DA:O had 2 bisexual LIs not playersexual LIs. Both Leliana and Zevran are pretty open about the fact that they find both men and women attractive - although Zevran does state a preference for women.
Playersexual implies that the gender of the player determines the sexuality of the LI - unless stated otherwise, like Isabela.
I have no issue with either way of doing LIs, but I do think its important to keep the two terms distinct as the DA universe has a number of open bisexual characters and using the terms interchangeably it may led to confusion.
This is exactly how I feel about it. I also think this conflation is why the conversations often get heated and flame out with mod closings. When someone states that "playersexuality weakens the character" (which, for the record, I don't necessarily agree with, even if I don't love playersexuality), people read that as "bisexuality weakens the character" and get offended. Or, someone who means "playersexuality" actually says "bisexuality" and causes a ton of issues. Now, of course, that's not to state that there aren't a bunch of people who are actually saying what they mean, but I've seen enough of the former to know that the wording should be sorted out.
For the record, I'm not convinced that any of the DA LIs were playersexual. We can clearly rule out Alistair, Morrigan, and Sebastian because they aren't open to the same gender; and Zevran, Leliana, Isabela, and (with slightly less substantial evidence) Anders, who all present evidence of being bisexual in the game.
So really, it's just Fenris and Merrill who even might be playersexual. And in no way do either give an indication about what their sexualities might be (outside of the Fenris hooks up with Isabela thing, which only means he's not gay, which we already knew because he could romance female Hawke). Some people interpret this as evidence that they are playersexual, but I'm not convinced. I would need to see Merrill say, "I'm straight" to a male Hawke and "I'm a lesbian" to a female Hawke for me to be convinced that she's playersexual.
Regarding my own personal preferences? I'm not a fan of playersexual because I don't like the idea that a character's sexuality can be changed by the PC. However, I'm fine with either the 2/2/2 approach, even if it means that someone won't get two companion romances OR the all bisexual approach. Either of them works for me. However, I do agree that we should probably not use playersexual to equal bisexual because they are not the same thing regarding gender (I'm not even opening up the can of worms around playersexuality and PC actions!).