Blm you have to learn to minimize movement to keep your dps up, (more movement = less dmg you know) one can only truly know this when you begin to do end game, were as some fights you have to move alot and not actually "just stand there" so i agree with Sentinillia. And actually once you get blm to 50 you do stack more Fire and we still use transpose in rotations. The odd times you may get a Firestarter proc under Umbral Ice you should transpose to be back in AF otherwise you would be gimping your dps.
For the most part it is true about just hitting buttons, the only one somewhat more complex i would say is Ninja. Classes were as moving does not affect damage will always be easier for most players, so maybe as others have said try Monk, Ninja or Dragoon.
As for sideskills, again sorry but level a class fully to 50 and you will see that some skills are actually beneficial levels 35+
Mantra for example is a level 50 ability from Monk in which i have both for my Bard and Ninja