I like the the way you can make your own class now. I think that is a step forward and going back to rigid pre-defined "you can't do anything without a group"/"You have such a pre-defined role/job/class that you are worthless by yourself. You can't do anything alone" is totally going backwards.
Again, aside from paladin (which is by definition a tank with cure spells attached to it), I don't see it as 'making your own job' so much as 'adding curing abilities/buffs to your existing job'; i.e. attaching raging strike and hawk eye to melee classes or just adding cure/bloodbath to any job that doesn't have healing. That's not really "making your own class" in my opinion, it's just tacking random extras onto your job to help it solo. If this is what we're doing maybe it should just be entirely classless and stop pretending the concept of classes exist in this game, i.e. there's a list of skills, pick what you want.