Red Mage could use some help.

[Tzain]

The problem with buffing RDM is the same as it's always been. RDM is insanely easy to play compared to literally every other dps class. At the top end of gameplay, yeah, it's outperformed substantially (8-10%) by a few of the other dps, and moderately (3-5%) by most of the rest. That's not actually hugely out of balance.

However, that also really only applies to a fairly small portion of the playerbase. For the majority of the playerbase, a substantial buff to RDM would make them overwhelmingly better than the rest of the dps simply due to ease of play. It's already relatively common to see RDMs topping the chart in the average PUG due to that factor alone. Personally I'd like to see a buff, but I can't really see it happening to any serious degree.

I'd be cautious looking at 'ease of play' when comparing Red Mage to other classes.
First, it's a "young" job. Which means it has the level of 'complexity' of a level 50 class. It hasn't had additional mechanics slapped onto it yet with expansions but still has to be level 70. The result is bound to be a 'simplistic style', but if you play a Black Mage at 50 it's not all that different from a complexity point.
Secondly, I think they're aiming for a bit of a 'external' playstyle. I tend to consider playstyles 'internal' when you're focused on your rotation, maintaining buffs, etc. Rather than focusing on reaction gameplay like procs, or supporting/healing party members which I call 'External' gameplay.
Healers are the classic example of 'External Focus'. The players focus is primarily on the group, that focus is like flexing a muscle. They have very simple damage capabilities because doing damage is like relaxing that Focus muscle for them. If you bounce a player too much between External focus and internal focus, you end up exhausting them mentally and many will find the effect jarring or 'unfun' without the ability to articulate why.
I think this is why Red Mage has the style it has. The external focus is related to their ver-cure and ver-raise utility, but their Damage mechanism, being reactionary Proc based, is external as well. The 'focus unflex' is during the melee combo, which is very linear.
Between the 'young-ness' and the 'external focus' Red Mage can be seen as a very simplistic job, I agree. But I think that's going to change quickly as the 'external focus' of their toolkit gets expanded in further updates.
What I doubt ever seeing though, is the addition of 'internal focus' gameplay of adding Rotations or Buff maintenance or Damage over Time.