I gave a run to the E5000 on the Mojo and I must say I am surprised knowing Mojo I expected a much warmer rendering and some lower mids boost compared to DX200/AMP1Ti.
That confirms what I felt which is that the mids are fairly neutrally tuned and accurate. The highs are also a good surprise on the Mojo as they usually have much less detail and sparkle than the DX200.
Also tried the MacBook Pro headphone out, it does quite well actually. Still fairly articulate and technically proficient not congested with decent extension up top.
The higher mids definitely help the overall signature to avoid congestion that can be problematic with warmer signatures. The E5000 are warm mostly by way of their bass, not the mids which I feel are clean and articulate.
It's more L shaped than a descending signature, you get boosted bass but clean mids and treble are not recessed IMHO. You get plenty of detail with a smooth delivery, which might be why some will feel it lacks in the treble department. You don't get sparkle but you do get good definition and when needed, bite.