#3 Generates heel heat
Alexa Bliss puts forth her statements on the mic in such a manner, that--as evidenced by the thunderous reactions she receives everywhere she goes--pushes the fans' buttons perfectly.
In other words, Bliss knows how to connect with the WWE Universe--be it as a heel masquerading as a babyface--case in point being her post-Elimination Chamber Match interview--or in a stereotypical heel promo.
A former WWE writer just went after JBL for his comments HERE
For instance, Bliss' heel promos week after week on RAW, against notable Superstars such as Nia Jax and Ronda Rousey, hit all the right notes, and draw the desired reaction from both the fans in attendance at the event as well as the millions watching at home.
The fans always seem to be invested in her feuds, and that in turn, is the most important point which solidifies that Bliss is indeed pretty good at what she does.