This isn't a bash on XI or its system
That is a lop-sided challenge considering the content comparison between the two games is astronomical 22 Jobs versus 7 classes, of course the one with the higher number has more to work with. I still think that you're missing what I'm saying so I'll word it like this and use your examples. If XI's system played like XIV's then you wouldn't have to choose between DPS SAM, Utsusemi SAM, or Hate Control/Burst Damage SAM and you'd have the ability to have all of the above. You'd be able to do high burst damage with hate control and have high damage output and have shadows being able to be cast. And, again, that is a lop sided challenge considering the time that XI has been out and how long it's been developed and worked on and how much it has to offer. In other words, it has worlds more because it's been out longer. More jobs, more options, etc. All I'm saying, simply and to the point, is that I prefer this system because you have access to everything. All this illusion is just a lack of comparable content. If we were to copy and past all of the jobs from XI to XIV then we'd have SAM's that could SATA/Boost/Souleater weapon skills and Beserk/Focus/Last Resort for DPS all at once and have Utsusemi on. PLDs would be able to use Sentinel/Defender/Provoke/Perfect Counter/Chakra/Utsusemi all at once.
I'm not bashing the subjob system because it did revolutionize how the game was played and did indeed allow people more customizing options and flexibility in how they played their main jobs. But if I was on my SAM and someone told me, "You have two choices. You can either have just the skills from this other job here along with your own. Or, have all of the combat skills from all of your jobs plus your own." I think I know what I'd pick. But again, we can't do that with XIV yet because the jobs aren't there yet and it's still being worked on/fixed/tweaked.
Again, this isn't a bash on XI or its system because I am fully aware of how it impacted the game. And again I'll say this, I am fully in favor of a job system to go along-side the armory system; but not to replace. I am willing to admit and take a look at the job system for XI and am ready and willing to admit for that game it's fantastic. But this isn't XI and I don't think that XI's system should come to XIV and replace the system already in place.