Nobody wants you to level up all skills. Just the ones you want/use the most. So in the end, just 8 or a couple more that you want to switch out for.
But you're going to have to plan and it'll be hard choosing to do what with what. But that's Elsword now. I doubt they're going to go back since this update isn't even that bad par the clear, in some cases, rebalance mistakes but they will address those in the future.