21st Custom Coach Can't Join Dynasty

You know, I'm not even complaining about all issues in dynasty or the fact that it's missing so many needed features or that there is no export app yet. I just want to get my full league in the damn game and we can't even do that. How is this not the biggest priority? Wouldn't it be nice that a game actually care about core features of the game? Telling people to use existing coaches that cause huge advantages and disadvantages is crazy.