Okay so first you are implying job design has to be this way because it just makes sense and then when provided with an example from the past you say 'well we cant do that anymore, that was in the past'. Currently I dont think SE will return to old job design. I also think that SE is doing a bad job at designing the game in a lot of places. So asking "What makes you think SE will return to it?" doesnt hold a lot of weight because I see them making a lot of mistakes.
Also job balance has been in a hilariously bad state for a while now. Job simplification has not come with the benefit of job balance. It has come so the SE can spend less effort on this game and more effort on trash projects instead.
The edit makes me think they are actually upset at this which ngl is kinda funny.