"Really? The fact that they've changed makes you hate the ME1
romances? They've grown in two years, without Shep, and that makes
them aweful people now? How could they have stayed the same after two
years? That just doesn't make sense. If Liara was the same in ME2,
I'd actually have written her off as boring. "Oh hey, you're back!
Isn't that so great! Want to come to my latest dig site? Oh no, you
weren't dead, you just had a cough right?" Hell, you're practically a
zombie. The way the person was before they might have just rejected
you out of hand because YOU'VE COME BACK FROM THE DEAD."
the fact that they changed for the sole purpose of alienating you makes me hate them. they havent grown, theyve gone insane. the change is completely unbelieveable, and more importantly, im not even given good enough reason to even try to justify it, its just there. this is a case of swing and miss; liara becoming a cold-hearted walled up deviant COULD have made sense; shes young and unprepared for the kind of crap she had to deal with, shes gone through alot, and she should be very conflicted about shepard considering her part in reviving you and what she knows; but instead of having that be a dramatic obstacle to overcome, they go NOWHERE with it, they just expect me to accept it, do her quest, and leave. kaiden and ashley have that dramatic moment, and while it definitely doesnt develop as much as it should, at the very least they send you an email that reassures that you still have a relationship, but with a very big problem to deal with (cerberus) in the way of it. liara does nothing of the sort, i can fully understand her being conflicted and distant about seeing sheapard again, but we are never given any sign that she will ever feel differently. with the utter lack of development regarding such a massive shift in character (kaiden and ash can at least be chalked up to a misdemeanor), i wouldve rather not seen her than experience the alienating underdeveloped excuse of a cameo.
but your right, this like pretty much every story element in ME2 is riding on ME3. we call hope there is an appropriate emotional payoff in the finale of the mass effect trilogy (which could even make the sum of ME2's alienation of LIs and ME3's payoff a story telling masterpiece); but considering how weak every import decision has been for ME2, im not gonna just hope ME3 ends up being the greatest story ever told in a video game. as far as ME2 is concerned, the presentation of the LIs (and jack) is horrible. if this is indeed bioware's intention to develop them in ME3 by causing distrust and dislike in ME2 to make it all the more rewarding, then i sincerely hope they know how much work that will be, because as it stands in ME2, i do believe theyve bitten off more than this new writing department can chew.