It only changed _specifically_ because Blizzard implemented the "interact with target" functionality. The fact that it benefited multiboxers was pure side effect, because it was not the intention of the function.
The shortcomings of a 5x hunter group (no tank, no healer, horrible pet AI) cannot be solved by blizzard adding a new UI input function.
So your comparison is not only inaccurate, but misleading as well.