A 1s GCD for the procs would be awful, because a DNC's Flourished procs also grant Feathers. You need to be able to weave a feather between the procs if you hit 4 to prevent overcapping; which, weaving with an 1.5s GCD on MCH was already a pain in the butt at higher latencies (and still is). I'd rather not see it introduced to another job. The 1s for steps works because you aren't able to weave anything between them - this wouldn't work in practice with Flourished skills.