What if we got the Sub-Job System in FFXIV?

[Enkidoh]

It'd also mean White Mage is the only sub job worth taking on any healer so what's the point?

This^ This is why the sub-job system in FFXI did not work as well as it seemed - it basically became not "mix and match Jobs to your heart's content", but more "find the sub that gives the best benefit to your main Job and only use that", specifically stat increases and especially abilities that it could use. Some Jobs due to restrictions simply were terrible when subbed (like BRD), and there were some that were pretty much "the meta" - if you had anything other than this when trying to do anything in the game you were laughed at for being "gimp", even if the sub you chose was actually useful (I don't know how many times I got harassed as a WAR main equipping MNK as a sub, simply because players were abusing NIN as a tank sub job for Utsusemi and refused to consider anything else - MNK was actually a very useful and powerful sub Job for WAR.).

Because of this nonsense, I am now vehemently against any kind of sub Job system being implemented here in FFXIV, and luckily it seems Yoshi has also seen this problem and is mindful of it, and thus why you will not see anything of it's like here.