That wouldn't work with DDR systems for two reasons:

1) They do not provide any metric beyond uptime vs damage. If everything is about dealing damage while having as high of an uptime as possible and nothing else, then everything is gauged how well it can move effortlessly to apply that damage.
2) DDR requires a lot of attention and focus, and there is a reason we see people struggling or complaining even in casual content due to the overabundance of it. If jobs difficulty increases, then most people are going to be overwhelmed (and I have no shame of saying that I will too), and the game will become a game for hardcore players only.

The rampant DDR must go if we want to have any hope at a decent job system that interacts well with thoughtful encounters.