I saw another post about promoting the use of more diverse rosters by restricting colors, but I had another idea based on a suicide league I play for fantasy football.
The premise is pretty simple: you can’t use the same hero twice. Have 10 nodes, with increasing difficulty. Players will have to decide what team to use for each node, but once a character has been used to win a node, they can’t be used again.
This probably requires a substantial amount of new coding to implement, so I’m not expecting to see it, but wanted to throw it out there anyway.