Mass Effect is already a game where an old women like Dr Chakwas have the breasts of a young girl.
While Chakwas was a more prominent NPC than most, she wasn't utilized enough to have the extra resources dedicated to giving her a unique character model. Instead, they took her face morph and stuck it on the generic body they used for any other female NPC. Saves time and money.
Where centuries old females only grew cup sizes as they age.
You've lost me here. Are you talking about Asari Matriarchs?
Where a beautiful actress describes her in-game character with her head being attached to a "disproportionate" body.
This one doesn't ring a bell, but I'll take a look if you have a source.
Where a generation of Asari Maiden prefers dancing in nightclubs while wearing cut out spandex outfits.
I'll concede on this one. I may not agree with what you're implying here (that all of Bioware is sexist), but I can't refute this point.
And do you not notice that they dedicate a lot of resources on the appearance of most of their female characters who have the highest probability to become fuckable to their heroes.
Would you like to guess why they get a lot of resources? Because they're fully-fledged squad members. They are significantly more important than some random NPC walking around on the Citadel, so they get more time and money invested into them. Go figure that the most developed characters are also the most likely to become romance options, eh?
So from what I can tell, you consider the characters in these examples to be sex objects, and rather than accept your misogynistic view of them, you instead decide it must be Bioware's fault.