I too agree with your idea! Not sure if we read similar posts or what but our ideas are almost identical! I posted this a day or two ago but it got hidden deep in some dead forum and didn't get to be really seen so I'll post it here. Alot of the ideas are similar or identical, but we each have some ideas the other is missing so I'll post mine and see what you think.
I have read many posts about what yoshi plans on doign and what others want to see happening. In one of Yoshi's letters, he talks about how new classes will be advanced jobs, or branch jobs (or whatever you would like to call it.) Another lengthy post I read was about how "jobs" and "classes" are different.
One of my main concerns, and I believe alot of others is that the classes aren't unique enough.
Combining these ideas I thought of a unique system that would keep the existing classes. (Feel free to add where you feel I missed)
Classes are all different and serve different purposes but they aren't very unique. As they stand they are somewhat similar, and most classes can do what the other classes can. Here is where my idea comes in:
Idea:
At a certain Rank when you reach a class(Lets say ~35) you are given a quest(yes they will have to add quests!) to unlock class specific jobs. Each class would have 2 jobs. To give more content, they could make 2 seperate quests, 1 for each job. Once you complete that quest your rank 35 can now be a rank35 with their job as " ". For example: I reach rank35 Marauder, my class is still 35 MRD, but my job could be set as either a Berserker or a Dark Knight. These jobs do NOT have levels. They are just the same as your class. Based on what rank MRD you are, you will be given different abilities, and able to wield different weapons.
Example:
a R40 MRD(Berserker):
Ability to wield 2 handed axes, and get the ability "Rage":Increasing Attack damage for a limited time, while reducing defense.
a R40 MRD(DarkKnight):
Ability to wield 2 handed scythes, and at R40 get the ability "Drain2".
These spells are just examples, but you get the gist of it. Each job can only use their specific abilities/spells. So MRD(berserker) couldn't use MRD(darkknight) abilities and vise versa.
So, with this system, once you are Rank50 MRD, you would have a 50MRD(Darknight/Berserker) (assuming you completed the job quests). In order to maintain uniquness, and so players cannot just switch at will, you would have to set your class job in a city. This way we can avoid MRD switching between the 2 just by disengaging, and defeating the purpose of job uniqueness.
Classes:
Pugilist
Gladiator
Lancer
Marauder
Archer
Musketeer
Shield
Conjurer
Thaumaturge
Arcanist
I added Arcanist and Musketeer as classes, as they are most likely going to be added since they already have their respective guilds in Lima Lominsa.
Then you have the Jobs which can be unlocked at R35 for their specific classes. These are just some ideas I came up with for their respective classes, and the weapon classes that become unlocked with them.
Jobs(weapons):
Pugilist
Monk (knuckles)
Puppetmaster (claws)
Gladiator
Paladin (sword with shield)
Ninja (dual wield katanas)
Thief/Assassin (Dual wield daggers)
Lancer
Dragoon (Lance w/ Wyvern)
Samurai (Great Katana)
Spearman (Spears)
Marauder
Dark Knight (Scythe)
Berserker (Great Axe)
Warrior (2-handed Sword)
Archer
Beastmaster (Pet and Shortbow/1 handed axes)
Ranger (Longbow)
Marksman (Crossbow)
Musketeer
Corsair (1 handed guns)
Gunner (2 handed guns)
Shield
Physical Shield Bonus
Magical Shield Bonus (Absorb magical spells or deflect certain ones for more damage)
Conjurer
White Mage (Club)
Black Mage (Staff)
Bard (Instrument)
Thaumaturge
Red Mage (Staff or Shield)
NecroMancer (Books)
Blood Mage (Books)
Arcanist
BlueMage (Scmitar)
Summoner (Club)
Scholar (Books)
I know there are other jobs people would like to see but this is just an outline, and what i feel fit the best for each class. Please let me know what you guys think! I know it is a bit soon to be worrying about what kind of jobs they'll implement but I like to think about these kinds of things!