Agree. Looks like that curve could be fit with 5 “handles”, and maybe two; even one handle and some venting. While it is deep there’s nothing steep here.
Like the perfect egg, perfect beer, perfect car, perfect lover-- everybody’s idea of “perfect” is different.
(And true perfection is rare in this world.)
Aside from the audiogram, what is wrong? Hearing sounds? Understanding speech? Understanding speech in loud places? Hearing music? The telephone? Annoyed by loud sounds boosted? What current HA is used and how does that work?
As Don says, the HA fitter may be far more important than how many bits the HA claims. There’s really only 6 HA makers, selling a couple dozen brands at several price-points. Any “NEW!” improvement one has, the others soon have a similar feature. The real task is working with the user and sorting through all the features to set-up the best result. (And the user re-learning sounds which have not been heard in years-- this takes time.)
If it is a question of 100-200-300-400 level: some brands have “Trial” aids which the clinic can program at different levels for comparison, perhaps 30 days?