My opinion what should be in her buffs(or features whatever you call them) (if any):-
Hold version of Elemental Skill :- which should be more of a utility than dps thing. Something like other Archons, which lets her blink/a platform to raise her to a certain distance up in the air and infuses her weapon with electro which lets her do a plunging attack.
Idle animation :- the Meditation in her Euthymia is one her of a shot in the trailer. Wonder why they didn't think of that as Idle animation.
Musou Isshin state :- She should be immune(Not invulnerable) to all kinds of Electro reactions, not just electro-charged.
These kinda features make a character irreplaceable and more interesting to play for a long time than some number tweaks.
Please let me know your opinions on this if you have read. Thank you.