Kwannon's death in the 90s did undo the mind merge, leaving only Betsy in control from that point onward. Not to mention that Betsy herself died and...
A lot of Morrison's work was retconned, but Whedon and Carey both built off of what he did in interesting ways (Carey was interesting; Whedon took 4...
To be honest, I just want to see them enjoy each other and actually do things. I feel like I can count on one hand the exciting things either of them...