I enjoy playing with Lv 50, 60, and 70 skillsets. And even partials. But frankly, allowing all abilities to be used would break old content horribly. They can't redesign the bosses to function with the new abilities, so it would basically turn MinIL and Sync into Unsync difficulty just out of sheer brute forcing through abilities. Having that many tools at your disposal in a fight designed for only Lv50 skills makes the fight ridiculously easy. I mean, if they want to add it as an option, I'm not against it. But it should by no means be the only way to fight old content. I still want to be able to fight thingd at MinIL with the (mostly) original skillset.