I don't know if this has been mentioned yet or not, but it would also be nice if the 15 minute abilities were on a GCD, rather than maxing the cooldown when switching to the job. This becomes noticeable for fights like the job nms where you may enter as one job because you have to, and you switch to the job you need to use but don't have access to the ability even though you havent used it in a while.
I realize 15m isn't a huge time, but it also means if you're with a group and need to be on a job you can't change class/job or your 15m will be down.