Yup I see what you mean – it's the same reason I always make sure my subwoofer to loudspeaker transition comes down by 100-150 Hz as you get much better clarity that way. Harman and default Dirac would have you take the bass boost up to 200 Hz or sometimes more, which is too congested sounding.
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So you don't think they sound bright at all? I'm trying to wrap my head around this. My FH3's are borderline neutral to just slightly bright to me, and that's with more bass and less treble if you believe the measurements. Is it just my ears?
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These also have more "upper bass bleed" than my home theater system but it doesn't sound as obvious to me on the IEM's for some reason. Perhaps it would if I tried the Truthear Zero.
That is my primary obstacle. I'd rather not take more accessories to work.