What's getting lost here is that this was a way to avoid both Nia and Ronda losing in a way that the fans won't feel is bullsh1t and robbed them of a finish.
She didn't look believable winning the MITB, but the best justification for her in her spot is that she's the best on the mic and character-wise in the company. She has a character people can identify and relate to real life beyond "I'm a good worker who came up from the indies/NXT and am slightly quirky"
She's being booked as an opportunist too, not particularly strong. She won last night with a weapon and lost clean to Ember Moon, who isn't a star yet, twice recently. She hasn't been getting a superpush lately.