This is something I keep wanting more and more. While the scripted nature of FF14 is handled fairly well by the devs, I don't think it does anything for content longevity. It also creates a barrier of entry for more difficult content which isn't a problem in itself but I'd like more challenging duties that I can just jump into without memorizing them beforehand. Changing the game to move entirely away from scripted fights probably won't happen, but SE could introduce content specifically designed to be unpredictable. I think it could work for dungeons and raids alike. In order to help fit the development of this content into their resources they might try to develop it over a period of time, adding some more variation patch by patch. It would also help if the content was design from the beginning to be scalable so that increasing the difficulty to match the next level cap is just a matter of turning up some numbers. Though even if SE did decide to do this, I don't see it happening any time soon. They have recently reorganized the way that they're releasing content already with the removal of dungeons and deep dungeons and the addition of stuff like Unreal trials.