The Class system isnt really that solo friendly given you need to grind classes quite a bit to actually get access to the various skills people keep mentioning.

The whole system just seems like a placeholder to tide us all over as v1 was incomplete with no content. I look back on the Class system in disappointment that I have levelled jobs I hated and will never play again (why should a career mage have to grind gladiator for sentinel)

I would rather if the Class system was abolished. Playing solo, I found every class a lot easier to grind when I switched to the job I unlocked. Playing in a party, its disheartening that skills like Sentinel can mean whether you survive or wipe when you are playing a mage job. If the Class system is to assist solo and casual players why I am going to a party based event on my class? (Ifrit etc). Why am I giving up my signiture abilities/spells just so I can equip a cross class skill. Those cross classing skills are undermining the Job rather than assisting the Job.

Arcanist/Summoner just emphasises why Classes need to go. When the artwork for Summoner is labelled "More" pet options and "More powerful" attacks, it is indirectly belittling the use of Arcanist in the long run.