With the introduction of 4* giving 5* covers, its obvious that D3 is now encourage 5* growth with ways other than Latest/Classic tokens.
So in the same spirit, can the 5* Daily reinforcement covers be changed to be colorless? It'll help those that are stuck with 5x in a color and then get a 6th cover that will be useless.
It shouldn't be that hard to do, give a special 5* token, that takes you to a screen to choose which of the three colors you need.