I think I've said this before but I liked the open class concept. People may not have liked the original setup of 1.0 but I think Tanaka was on to something. I was sad to see them abandon the concept altogether.
I liked the open class concept too. All that needed to be done was add a couple of traits and higher tiers to each class to add structure to each class. Then to fill that need for players to see iconic jobs. You would gain a job stone and lose the ability to cross class when changing to the highest form of that class. For example lancer to dragoon. The job would give you job specific traits, gear, weaponskills, magic, abilities unattainable by any class at the post 50 levels. To that end, it would end up sort of similar to FFXI in the elder game years as the cap raised. The final effect of playing a job would feel similar to playing a job when the sub job was restricted from you during certain FFXI events.
To retain the want for the disciples of the hand and land during battles. I would have gave them one free slot in parties as in they do not count towards the party cap. They would give bonuses to the party just being in the group applying certain unique buffs, for instance let's say reduced gear wear, heat resistance, luminessence( light for darkened areas), build tents for safe zones in hostile areas, create special tonics to cure certain unique debuffs, build small pontoons to reach bonus areas, etc, etc. There could be actual quest lines to further special avenues of progress for DoL and DoH. Say one quest line could be reaching a special forge deep in a dungeon or gathering from unique nodes.
A different direction has been taken though. I suppose this direction is better as far as easy balancing and keeping things more understandable and simple. The new direction also may lessen the burden of new players feeling required or overwhelmed by leveling too many classes. Is this new direction better or worse? That is up to each individual. But I don't think it can be argued that the opportunity for more depth has been slightly dampened. I suppose every person can ask for changes to certain contents. But ultimately a choice comes. Love what is presented or cry over spilt milk here and there.
Positivity and negativety is like a snowball. Once the ball gets rolling in a direction. It usually continues until it crashes at the end and explodes.