I wholeheartedly disagree. Powering them from something respectable, like a FiiO X7mkii + AM05 , or a iBasso DX200 + AMP5 gives one of the most interesting sounds I ever heard about.
Have you heard them personally, or why do you believe they sound like that? What even makes you say that, the technical side of the sound is similar to LCD-4, but they also have a bit more musicality.
I don't think you have to worry, it is an amazing headphone.
I don't think you can have the bass too extended
For dull / less impactful, they render what you're feeding them, with death metal they sound quick and impactful, although not overbearing, mostly within the neutral part of things with a side of impact
For the midrange, I'd say that they overdo LCD-2, maybe not reach quite LCD-4, but really, LCD-4 is 1K$ more
Didn't have a chance to compare with LCD-3 yet, so can't say hjow the midrange compares, but compared to LCD-2, it has more detail and more breathing space, at least driven from DX200 or X7mkii
How did you manage to overdrive them? I am a bit curious as I listen very very loud, and never managed to overdrive them powering them from FiiO Q5, X7mkii, DX200 all on extremely loud levels. Maybe if the source has tons of power but not the same refinement as X7mkii or DX200 offers, like an Opus #1s, which is extremely strong, you could be not satisfied with the power / clean-n-ness ratio, but with X7mkii or DX200 I really think I am a happy camper.