There were indeed calls for Becky to turn, because there's calls for everyone to heel turn, especially when wwe isnt doing anything with them. People wanted Baeley to turn just because of how much she got buried, but you think she'd actually make a good heel?
Becky has been better than expected, she switched up her whole demeanor. The problem was how they did it. Making Charlotte come out of nowhere and win the belt again, clean, by pinning Becky is classic wwe Hogan/Cena/Reigns booking.
If you want to actually get fans to buy into your heel/face dynamic, you have to present it in a way that actually makes Becky come off as out of line and a bad person instead of making her beatdown into a cathartic experience for how the fans feel. The company is clueless about how to tell a story people can relate to because they have that backward conservative victim mindset.
So now that they botched the turn, they have a few weeks at most to get it on track by having Becky really do terrible things and come off as unlikeable. Tough to accomplish in the wack ass pg era. If they cant do it in a couple weeks they need to cut their losses and pull the trigger on the double turn, otherwise it will damage both women permanently going forward.