Like it or not the ability to level all classes and easily change between them is one of the basic design aspects of the game. And limiting a character to only one DoH class still wouldn't stop me from having them all maxed, I'd just have to do it on different characters. Cause I like crafting. I'm at 50 on all the DoH/DoL classes but my highest combat class is only 34. Most of my FC's members consider me insane. Which I am.