I've put in over 170 hours, and love playing many of the characters...but rarely ever play extensively with any one particular fighter. I'm pretty decent with many of them and completed all the challenges, but I'm hardly pro level.
I don't know if, it is just me, but I am not enjoying World of Light. Playing classic is great and very fun, even on higher difficulty, but world of Light is not working for me. Even on the Spirit board, some challenges are too random for me, and liberate the spirits, shooting the gun on the right time, is also something I don't like.
Since I already unlocked all characters. I am seriously considering drop this mode.