Arena Change and 6 star
Here's my 2 suggestions. Arena is super boring, no one enjoys grinding. I think it would be fun to add an option of using only 1 champ against the 3, no life reset at start of each match, for an increased multiplier. This would be like an option for the player. Risk losing the streak but with reward of getting higher score. Suggestion 2 is to forget about 6 star champs. Rename them or something, like Ultimate _____. A final champ that can't be reduced in value at a later date. It craps all over the champs we have worked so hard to obtain. If the goalposts keep getting moved, no one is gonna run the race.