It’s not just synchronisation of burst it’s the profile of how the job originally functioned compared to now

The reason why the second most meta class in existence is NIN is because NIN bent the entire burst profile of other jobs around it with the existence of trick attack. Other jobs chopped and changed what they could to fit into NIN’s trick attack meta. This negatively affected the DOT’ers, the sustained DPS and the rampers. A lot of classes didn’t really have a defined burst window, you just kinda chopped and changed what you could to fit where depending on the fight. Because of this resource management was handled completely differently to how it was now and this played into the ability to design abilities that weren’t just “pool damage in the burst window”

The two minute meta SYNCHRONISED burst windows but it was ShB itself that favoured turning everything into having the burst. Changes such as divination on AST, introduction of DNC that had technical, removal of foes requiem on BRD you could functionally play when you wanted, addition of big burst attacks to jobs that didn’t care about burst like confitier on PLD, trimming down of SCH and SMN’s DOT’s which were hostile to bursting. MNK’s ShB redesign which became the EW design changed its ramping nature into a burster etc

And since they also started favouring the burst window they removed things that could interfere with one person’s burst over another so situational utility was pruned. Silent dusk, fey caress, time dilation, dark passenger the list of removed utility is endless because situational utility is useless when everyone has to be equaled allowed to perform their burst even though they didn’t used to because not everyone had a burst

The 2 minute meta isn’t really at fault, the main fault was the creation of the idea that every job had to have a burst and that’s homogenisation because it changed how many jobs felt to fit a narrow meta design built around NIN