One thing I’ve run into personally is scaling issues with 5s. I’ve seen this mentioned in other threads as well. My idea is to have a * level lockout feature, where before starting an event you choose the maximum level of s you’ll play with. Sort of like what happens with SHIELD level. That way while you are making a * level transition you can play with the characters you have covered but not any of say 5 or 4 characters. When playing the event these characters would show as locked out like what happens with heroic events or if the same character is on the opposing team.