Are detailed sex scenes a bad thing for the story? .

One of Mass Effect main pillar is the relationship & interraction build around squadmates.

To see the relationship changing to squadmember to friend to love interrest to soulmate is the most important part. Yes, the sex scene kind of show where the relation is going, thought it's a videogame, not a porn movie. I don't care if I see boobs or butts or dongs or naked alien stuff, I just don't want to sit in front of my tv watching animated porn for 2 hours. I would say the romance scenes with LI in Andromeda are okay, thought they could be longer. I mean, you flirt with once or twice, another time you kiss it, the third thime you 'wouhou' her/him. In total, it took 15minutes to go from 'I don't know you' to 'let's go bang toghetter all night long'.

And what I dislike the most, once you get the final romance scene with the LI, all next interractions with the LI behave normally, like if nothing happened. Could it be possible to make, at least for MEA2 or any upcoming updates to add some different dialogues, animations and behaviors when the LI is actualy the LI and when it's not ?

Example : Let's say Suvi is my LI. In the current game, Suvi is always sitting in the cockpit. When you go chat with her, she salutes you with 'Ryder', her normal dialogue shows, then you say I should go back to things and she anwser 'Sounds gud', even after you did 'study biology' with her in the science labs on the nexus.
Instead, after you started romancing her, when you go talk with her, she could say something romantic instead of her normal talk, like 'hello my love' or something, and having more 'flirtarious animations' towards you. Also, instead of just sitting in the cockpit, she could also be seen in your cabin just chillin' there, waiting for some fun with you or just relaxing. IMO, this kind of stuff could make the LI less rigid and would feel more like a real relationship than a one night fling.