Maybe it's time for evolution to move us forward.
Well, there is no guarantee that "evolution" improves an art form - only that it changes, and that it adapts to circumstance.
Circumstance in aikido is what makes people want to do it, and stay doing it. That does not necessarily have anything to do with self-defense.
Actually, aikido stands out as a budo in the way it accepts diversity and very different ways of doing it. See Osensei's direct student, whose aikido is quite different from the founder's - and from each other.
I am glad that aikido is not homogenized, because that would surely kill creativity within it, and destroy the possibility of change and development.