Is it fun?

[SieyaM]

Thus far though, with FF14 we've only seen that with world's first runs.
Anything beyond that... not really. That 100 DPS isn't gonna make or break a run (and if it does your team had much larger issues to worry about), so outside of racing for a clear (the only time where light parties are more directly competing with each other) players are just playing whatever jobs they like the other 99.9% of the time.

I would say the jobs being made so similar now, especially healers, is a result of people trying to force a meta comp in the past for other content. Even now people change jobs every patch almost to try and be the highest DPS ing healer. The fact that people do change jobs so readily is also an indicator that the jobs themselves aren't all the fun or unique, since people are so willing to drop one and play another. Most healers I have seen here keep all 3 max level and do so because they know they might have to change to another if one job has a lead on another, again no matter how slight.