They sort of tried in Leviathan. Squadmates and I ended up firing our Claymores, Widows and Javelins on fully automatic in cutscenes.
It only sort of works when you've games where there aren't many different weapons and some types are mandatory, such as in ME2 when every class had a pistol and they all functioned as semiautomatics.
Like Tali autofiring that Claymore wasn't the best part of Leviathan -- and Leviathan's my favorite Mass Effect DLC.
For me, I'd like to see two seconds spent researching biology instead of just rule of cool.





Do góry






