Case in point: Do you remember when Warriors had an interrupt on the 30s cooldown? That would have been a deficiency. The idea was that Warriors had an interrupt away from the GCD, while Paladins had one around the GCD but without cooldown, forcing each of them make use of their skills differently. In practice, however, with every physical class getting an interrupt off from the GCD and having FFXIV Gil a shorter cooldown, Warrior interrupts were functionally useless. The cooldown made their interrupt deficient, suitable exclusively for rare circumstances. So the cooldown came down.Warriors still the worst interrupt out in the three tanking jobs; Paladins don't use a cooldown and will Pacify, while Dark Knights will get a reset for parrying. But it's not just a deficiency. Nor will it be a deficiency which a Warrior can't close distance such as a Dark Knight or sport a Paladin's passive mitigation; that's intentional.
Warriors can perform more damage than either in the above and employ a number of self-healing tricks that this other two lack. They have weaknesses, not deficiencies.Deficiencies use a negative affect your ability to accomplish things from the game. When 2.0 first launched, Warriors were deficient and never up towards the job of tanking in numerous bits of content, producing some major changes to get them in line. Machinists and Astrologians likewise lagged when first introduced, necessitating some improvements to stop making them incapable. The jobs are inside Final Fantasy XIV Gil a good place now.That doesn't negate weaknesses, though. On Machinist, I still have lots of emphasis on cooldowns and luck. I have no defensive cooldowns whatsoever, until you count my damage cuts which themselves have lengthy reset times. My health is low and I am likely to do less damage than a similarly geared and skilled Black Mage or Dragoon.On one other hand, I may stay beyond melee range, get extra damage from turrets, can use debuffs for making the rest in the party play better, can use those damage cuts to weaken a boss prior to a big attack fades... you receive the idea. My damage could possibly be lower than others, however it's still competitive and solid. And that's all assuming equal skill from all others; I've had runs wherein I was rocking the most notable end of DPS with my gun.