Black or white, NONE of WWE's women's titles should be monopolized (if they are though, Bayley and Sasha have LONG deserved this kind of spotlight). This is the deepest and most talented women's roster WWE has EVER had, even without Becky and Charlotte. Now is the time for actual variety and to see what sticks and what does not.
However, this is a booking/creative issue. Shayna, Naomi, Bianca, Nikki, hell even Lacey and Sonya are all viable women's champions right now.
I get Ember Moon's point in THAT regard. But I'm not rolling because I didn't see this energy from her when one woman held BOTH women's singles titles.