1. This could be a general issue:
-too many skills seam useless
-rank II Skills (especially WS) are only slightly better
-a lot of the high rank abilitys are worse than low ones
Worth mentioning:
The abilitys that grand you a evading, parrying, hitting (and so on) bonus for one succesfull evade, ...are totaly useless.
The battles - even the solo ones - are far too short. An ability like that isn't effectiv at all in such a scenario.
2. (Maybe only a Gladiator issue).
-you have a ton of usefull, very similar skills that could never be used in one fight.
-far too many short duration actions and skills.
Just an example for my last point.
Here is a Gladiator Only list of usefull but very short lasting skills:
-Aegis Boom II
-Outmanouver
-Guard
-Deflection
-Rampart II
-Provoke II
-Still Precision II
-Obsess II
-Cover
-Cadence
-Sentinel (The Fifth!! 20sec Defense-Bosst Skill)
-Tempered Will
This mean, if i want to use my full potential as a gladiator i have to use 10 buffs constantly during and after/before battles, making the first ones dissapear while the last ones are beeing used.
The best way of fighting is therefore using only 3-5 of your own (10+) class skills, because there is no time to use them and if you use them, they don't last long enough.
(Same goes for every other class i played)
In my opinion 2 things are very important for skills in general.
1. Skills have to get (significantly) better with every Class Rank and especially with every Skill Rank.
2. Abilitys always should be a help for the player and not blend in others or rival against very similar skills.
The missing spots left after deleting similar skills, could be filled with unique, class specific passive skills like in FFXI. I think it was a great way to give every class a unique touch.
For example.
Gladiator could get 1 Mag.Def and Defense boost with 20, 30, 40 and 50.
Marauder an Attack and Parrying Bonus (maybe HP, too)
Pugilist could get Attack, Evasion (maybe TP, too)
Thaumaturge Mag. Attack + Precision
(and so on...)
But it does not has to bee exactly like that. The Passive skills could be used in a more FFXIV-Like way, increasing certain Skills, like the passive Rank 30 Class Skills we have now.