Prior to leaving the RCC, I had been to a number of Youth Masses, which used the Apostles' Creed. This, of course, has no filioque.
I wonder what would happen if that supplanted the Nicene at RCC Masses in general. The AC is shorter but it does mention most of the major points of doctrine contained in the other.
I don't know if it'd ever happen. However, it would alleviate at least the obvious difference, require very little change by the RCC and none from any other church. Just a thought.