The problem may be how we read the sentence.
It reads "will now take group composition into account."
This does not immediately translate into "only drops for classes represented will occur."
In all likelihood they just decreased the chance of non-represented class loot from dropping, not eliminated it altogether.
In all likelihood they just took your group composition and completely reversed it. Don't have a smuggler, 80% chance for smuggler gear to drop. Whether it's intentional or not (I vote not), I do not know. Someone either accidentally reversed a mathematical equation or they just really like to piss us off.