Nothing wrong with the odd side quest. Besides, that happens already.
Slight difference between achievement and side quest...but hey, all I said was avoid the false advertising
In any case, while ED is an awful game for them, if players are that desperate to feel rewarded it should be an entirely optional affair. I can personally imagine nothing more infuriating or immershun killing than some fanfare playing with a pretty achievement drop down appearing because I managed to shoot a half decent enemy...