I really like this idea. It is simple and encourages people to choose to level their job because they like it, rather than because it gives them an ability.

My only concern with this idea is that a class-specific system makes it hard on some of the more specialized classes to solo. This is why I believe they tried the multiple-class abilities approach, but I think we all realized that it takes too much away from enjoying the job you're playing and made leveling into a giant ability grab. All I am wondering is if anybody has ideas on how to make Kuro's system more enjoyable/easier for solo players?

One of my initial thoughts was to just encourage duo play rather than to keep the emphasis on solo play. I feel like duos are easy to create for casual players and they encourage making friends, which is what develops a strong MMO community.