Reason Behind the Suggestion
Okay, so here are the reasons why I've made this suggestion.
Every single Final Fantasy game has explored new areas of gameplay, and most have a unique system behind them. The unique system for this game is the armory system, where people can change abilities based off of their equipment. The can also use cross-class abilities relatively effectively.
The issue with the current state of the game is that the armory system has been overshadowed by the implementation of the job system.
The armory system has all of the characteristics of a skill-based ability system, where people can level up multiple ability paths and use them all. However, in the end all players end up with access to the same abilities, causing dissatisfaction.
Another issue with this type of system is that people who have leveled a number of skills to their max will be far more effective than other characters of the same level that have only maxed one skill.
The job system has all of the characteristics of a class-based ability system, where people can only level up one ability path. However players of the same class will eventually end up almost exactly alike, with little non-equipment customization. Again, the lack of customization causes dissatisfaction.
In order to fix these issues, skill-based system normally have a limit to the number of skills that can be maxed. Class based systems tend to fix their issues by allowing multiclassing (seen in FFXI, WOW, and many more.)
So now we come to the issue of the current system. We have a skill-based system sitting as the base to the game, and a class-based system sitting on top of it. Both are affecting the same abilities, so the two systems clash.
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So what can be done? Obviously both systems will continue to interfere with each other if nothing is done, so either one system needs to be eliminated (not prefered), or the systems need to be combined in a hybridization.
FFXIV has the potential to achieve this hybridization, which I'm mostly certain has not been done in an MMORPG before. This could create a very unique system for FFXIV. Thus the reason behind this suggestion.
1) The skill based portion of the game.
-The greatest issue (power balancing wise) with skill-based systems are the exponential multiplication of skills and the homogeneity that it ends in. By limiting this to the low level skills, the exponential multiplication is not as evident.
-The other large issue, the need to obtain skill in EVERY job is also mitigated. By limiting the system to the low level abilities, much less time is needed to achieve low level mastery of everything. This is especially true as Most RPGs level exponentially, so the later levels are much harder to achieve. This also has the side effect of people getting experience playing ALL of the classes, while not being too-detrimental time-wise.
-Even though the exponential multiplication of low level abilities is not as game breaking, it would still be nice to mitigate this some more. We can use the usual method of fixing this by restricting the number of low level abilities available to the player at a time.
2)The class based portion of the game.
-Players like seeing the Job system, which is a familiar and recurring party of the Final Fantasy series. It is also very familiar to most people.
-Thus, we add in Jobs
-We also add in subjobs, to mitigate some of the issues of the class-based portion of the system.
3)The hybridization
-High Level Abilities determined by Job
-Mid Level Abilities detemined by Subjob
-Low Level Abilities free to all (But resticted in number)
4)Application
-High Level Abilities: Use the job system
-Mid Level Abilties: Use the class (weapon) system as the subjob
-Low Level Abilities: Use the armory system
*This can not only be used for abilities, but also traits as well*
5) Whats left: Determining what abilities fall where
-This is the reason for the list of abilities that all player should have access to.