Originally Posted by GM4Him
I had 6 party members in Prologue with 4 custom and Lae'zel and Shadow with a scrollbar for inventory. It's already there. They just don't allow it after prologue
Maybe ... they werent expecting that people would demand it so hard ... and they started experimenting with this option just now (read as: recently).

What patch it was, if i can ask?

In the words of the senior NCO instructor at cadet battalion:
“If you ain’t cheating you ain’t trying. And if you got caught you didn’t try hard enough!”