I'm reminded of the interview Yoshi-P gave shortly before 6.0 released, where the interviewer asked about how most core job abilities/buffs had been changed to fit the 120s burst meta, but that Leylines was still at its original 90s. Yoshi-P answered that they still wanted jobs to have abilities where players would have to think "where would the best place be to use this ability?" and that Leylines was one of those abilities. Yoshi-P also said that he felt like if everything was on the same timer, it would feel very boring to play.
It's funny that Yoshi-P was correct about it being boring to play, and yet the developers still went ahead with shaving down everything to fit into it.