Good for her if she perform a similar feat with Kaido in hakai, but everything else was poor(expect durability/endurance).
As
@Echizen_Jo_Ndule call it out, Hera make a huge hole with a thunder attack, yet we didn´t see a similar feat later in the castle.
Prometheus could easily cover the entire room based how large he became in Wci.
Adv CoC was used against Pageone but after that BM didn´t used it even for once onpanel, Kaido combinate his fire avatar with adv CoC right now. Why she didn´t do it against Kid and Law?
Oda made it sure that Onigashima was to small for a battle between Luffy vs Kaido, they are legit showing crazy feats.
I agree Law did something similar too, but BM feats against Kid and Law been very underwhelming.
In fact Kaido speedlbitz Snakeman, show even Future sight, show so many different forms, so many great abilites.
Big mom had great abilietes too but Oda draw it pretty much lackluster without the reader feeling anything.
Portrayalwise Kaido is far better so far.