With the caveat that I'm not the best or most experienced black mage;

I can't imagine a black mage without the enochian timer. That pressure to get your spells in on time is what makes the class exciting, and what makes it feel so good when you get it perfect. I choose to play it over other dps classes not because I always get it right but because it's more stimulating than other casters.

I haven't enjoyed playing one of my other favorite classes (AST) since the 7.0 changes, so it would be sad to lose another one.