I kinda agree with the OP, it would make it easier for us to learn the new skills we get.
Ive been running NIN through levelling roulette and I've really been struggling to learn lv60+ rotations because half of the time Im rolling dungeons where the skills are disabled.
While NIN is a lot of fun, I wouldnt say I really know what Im doing and find myself staring at my skills when I should be paying attention to mechanics. If the skills were unlocked in synced content then I think I would have a better feel for whats going on.