That has been a problem with this game ever since Stormblood.
When CBU3 decided to keep the amount of buttons roughly consistent they started scrapping low level skills in exchange for new shiny ones for the expansion, but then they never bothered to rework at which level you acquire your skills.
So every 2 (now more like 3) years the lower level experience gets increasingly worse since they remove skills from those level brackets but all the actually good skills get stapled to your job close to level cap.
This makes it especially funny whenever someone tells new players to take their time and not rush to endgame. I'm sorry but endgame is the only time the class kits are actually coherrent and the gameplay isn't absolute dogwater.
