Of course BW didn't intend for the hug to be interpreted in any specific way, they intended it to be interpreted as "yay, my friendly beloved squadmate!". But obviously that's a thing that's going to make some people go "wait, what?" precisely because they never felt friendly towards Liara before, and took options that in some way reflected that. Then BW goes "nah, you like her!". Honestly, I don't even remember that scene myself, but I can see how that that would crudely retcon stuff for some people. I'm just saying, don't force these kinds of "emotional" moments on people if you've allowed them to play differently before. It's not about making options that would please everyone, it's about not forcing options that clearly don't fit some possible playstyles. "Possible" in the sense that they could have been chosen in your game. Then the choices you actually offer are an entirely separate issue.
Anyway, I do agree with you overall. Developers make games in their own style. I didn't particularly like Fallout 4, but then again, that's because I feel they went more "the BW route" than FNV or even FO3 did. I just personally don't like that direction. I have this dream RPG in my mind that combines rich personal npc storylines with the freedom and versatility Fallout used to offer, and that's why I'm even talking about it on a forum. Maybe some developers somewhere are listening and have a thing like that in mind, but I'd be happy if at least some elements of what I'm imagining made it into either a BW or Bethesda game. I'm just sharing my opinion. And as an addendum, books are not interactive, so I think they're governed by slightly different rules.
All that said, I kinda disagree on your opinion that ME offered "a lot of story choice", but then for me the ending kinda makes the story, so again, it's my personal view.
Saying that Bioware intended the hug to be interpreted as "Yay, my friendly beloved squadmate" is saying that they intended for the hug to be interpreted in a specific way. I'm saying they only intended the hug moment to be cinematically compatible with the "other" cinematic where Shepard kisses his LI Liara - to save on programming resources (time) and just didn't really anticipate the situation where people would be perturbed at hugging her.
I agree that books are not interactive (although the concept of authors writing books to be somewhat interactive might yet happen). An RPG is, though, in some respects like writing multiple books on the same story... and there are only so many directions an author can allow the RPG story to go in before, essentially, there is just no coherent story left.
I accept that a lot of people disagree with me... but I've played a lot of playthroughs in the ME Trilogy... and I have come to believe over those playthroughs that there is a lot more player choice available in that game than people generally give it credit for... without forfeiting a coherent and engaging story in the process. Of course, Bioware can insert more choices... I'm just saying there will most likely be a cost to them to do so - paying more programmers more time, paying voice actors for more lines of dialogue, paying the writers for essentially writing more divergent storylines to reflect the greater range of choices... so I'm asking whether or not we, the players, are prepared to pay an increased price for the game for those choices? It's a fair question, I think.
In addition, with more choice selection, the game itself would probably get larger and require a larger system to run... are we prepared to buy those larger systems to run such games? Again, a fair question.
Those are questions that Bioware and the entire gaming industry has to ask... if they don't want to wind up producing the "perfect" RPG in theory... but one that people won't pay the price to buy.