You can see that that kind of role the FFXIV's player like to have in combat.
Melee DPS 37%
Range DPS 22%
So in a group of 5-6 people there is less than one that likes to play healer. But in a group of 10 there is one.
Personaly I have liked Crowdcontroller or/and Healer in MMO.
The problem that there are not enough people that like to play healer in small groups. That problem has been solved diffrent in diffrent games.
A nother problem, classes that are only is good at healing will be bad at playing solo.
One way of solving of the two problems is that you combine healing capcity with a damage capacity (melee DPS or DPS from a distance).
Solving the problem combining healing capacity with a damage capacity can be done in two diffrent ways:
1) Create only a few healing spell so that that the person that play the class are expected to use other abilities while healing are on "cooldown". Then the people that like to play healer and DPS from a distance (or healer and melee DPS) are happy.
2) Create lots of healing spells (Diffrent targets: Area of effect, single target, group. Diffrent casting time: short and long. Diffrent effect time: heal when the spell is casted, healing over time. etc).
and the person that plays the class are expected to be full time healer in the group. This making the people that enjoy the healing role happy.
To make him good at solo at the same time : a) He changes his ablities/spells between group and solo b) He is slightly more powerfull than the other classes.
Obvious (a) is the better choice.
There is also a 3rd option:
3) Create only a few healing spells. But the most effective way is that one person in the group only use healing spells. In that way you takes the bad from (1) and (2) and don't get any benefit.
Basicaly you make healing less fun for the dedicated healer without giving the "healer and" person the option of playing a healing and DPS stile.
What are the current state of FFXIV ?
Are there enough variation of spells to make it fun for a dedicated healer?
Or are healing spells on long enough cooldown to make a "healer and" work better than a pure healer?
Or have the solved it in a nother way (ex by making Crowdcontrol better in some situation and so favour "healer and").
I understand it from "Conj needs to be split - WHM and BLM" that Conjurer is a "healer and burst Range DPS" class while Thaumaturge is a "healer and Range DoT/debuff".
And there is only 1 pure ranged DPS class and it's a none magic class (archer).
And that one reason people like to split Conjurer in white mage and black mage is that they want to play a none-healing class that is magic user (black mage).
If you like to have a none-healing class that is magic user is not the subject of this thread.
If you have a none-healing DPS Mage, it is possible to combined with both the options (1) and (2) above.