Things like this are hidden because if they were visible, players would see they don't change anything. It doesn't matter how much crit you have your crit rate is nearly always the same because every time new gear comes out they tweak the value for stats. It's why a level 90 BLM has the same cast time on Flare with several thousand spell speed as a level 50 BLM with just a few hundred spell speed.
All those extra stats do nothing even crit. All the thousands of points you can pile into it but your crit rate is still always much the same, even if you go unsync a level 70 raid with level 90 gear and stats you'll still have the same crit rates you had doing it at 70 in 70 gear.
It's also why you can go do Midare on a level 90 boss and find it does exactly the same damage as it does against a level 1 bug. Because the 90 boss has the exact same defence and resistances as a level 1 bug, just a massively inflated amount of HP.
They don't make the information visible because the stats are effectively worthless. For example: If you log in during patch 6.2 and see you have 4567 crit, and a tooltip popped up telling you that’s a 38.90% crit chance. Then. on patch 6.4 with the same gear and 4567 crit, that same tooltip would be like only 37.65% crit chance. WTF???
Then when you’ve busted your behind off to get the shiny new raid gear and now have an impressive 5678 crit but the tooltip goes right back to saying 38.90%!!! WTF?!? You’ve gained NOTHING!!
Reasons why players are bored of the gear treadmill #42
The ONLY stat that matters is I-Level (BORING)
The game has always been fighting a contradiction of itself though... on multiple fronts..
its a Final Fantasy that's trying to be World of Warcraft,
it's an MMO that's trying to be a single-player rpg.
It's trying to build on all the things Final Fantasy fans love, while at the same time destroying them all to keep it dumb and simple..
It's a mess