Hum… . I see,
I think the main problem is that some of your characters are considered “trap” characters, as in characters that wasn’t necessarily that good when they first came out either or quickly fell off in general and are pretty fragile. By “trap” characters I mean characters that person who doesn’t know better might invest in and ending up having a harder time in the long run.
“trap” characters could be said as super outdated characters as well, so yeah characters that the game expect you to have moved on from most likely at this point in the game progression.
The “trap” characters are Genie, Jack Skellington mostly probably, but characters such as Jafar, Jasmine, Bogo, Flynn Raider, and Mad Hatter aren’t really relevant anymore either.
I am not sure about Robin Hood and Darkwing Duck’s current position in terms of how good they are, but I think they should be useable, Darkwing Duck especially as his Red skill should be really good :-).
Rapunzel is fine, not meta(the best of the best), but will do until the next main healer comes.
Slinky might not be top meta, but he should be in the useful meta category so he is good to have.
Hope this isn’t too crushing, but yeah want to help you understand how things are in terms of your characters in the current game meta.
So yeah, hope this information can help you White_Wolf_V :-).