Morena is a prodigy
In the latest chapter of hxh , Morena states that her ability utilizes all 5 ( probably meant to say all 5 other affinities besides specialization cuz she says all . So , 6 in total ) . That is INSANE .
We have never seen someone utilize all categories simultaneously . The most we have seen is Issac Netero with 4 ( enhancement for enhancing his punches , manipulation for controlling the statue , conjuring for creating the statue and emmision for the zero hand attack ) and HE was the CHAIRMAN of the hunter association and strong enough to fight with ant KING . Also notice her dark backstory . Nen responds to emotion and she has some strong emotions .
So , I feel like you are highly underestimating morena and the fact that she is a prodigy who can utilize all categories simultaneously and that she is specialist .