I am at that point where 5* are completely useless. I generally use my 5* duplicates as fodder like most of you. So, to me the only 5* i am intetested in is to fulfill the museum collections. For instance I need tough Dwight, fast Andrea and fast Rick. I have an idea to get the rare 5* you need.
Scopely goes through all of the 5* and assigns them to a tier based on strength. Tier 1-3. Examples: Tier 3 could be shields, Priya, Monica, ascendables, etc. Tier 2 could be revives, Viktor, Romanov, etc. Tier 1 could be 5* with very large AR such as Christa, OG alert Rick, etc.
Scopely creates an area where you can purchase any 5* you want with 5* tokens. Structure is as follows: Tier 3 5* = 20,000 5* tokens, Tier 2 5* = 15,000 5* tokens, Tier 1 5* = 10,000 5* tokens.
So, you will be able to close all of your museum collections! Yippee!
Also, this would not replace the standard wheel. You could continue to use RNG to get your favorite 5* or use the my suggested method to get exactly the one you need.