In my opinion, this is more of a "what came first, the chicken or the egg" type issue.

Before every job was designed to fit in the same 2 minute burst window, we had some jobs that fit in that burst window, some that had out-of-phase burst windows and some that didn't have their buffs line up well at all, so they just sort of used these buffs when they saw fit.

The playerbase started lining up buffs like Trick Attack along with Chain and Battle Litany and found they were powerful. In turn, players began to move away from the "non-lining-up jobs." Players that didn't want to move away from these jobs started providing feedback to SE that their jobs are now out of favor because they don't fall into those windows. So SE began making more jobs (all jobs?) fit in that 2-minute window. And that's where we are today.