I HATE anything with an artificial treble rolloff (the shrill grainy treble). It's like shaving the treble off just to make it seem more warm and organic artificially.
The muddy sound you're describing is what happens when you have a forced treble cutoff and enhanced mids. It's hard to pick stuff apart.
As for bass, it's got enough, it's probably a fit thing or you're used to headphones. The TF10 is not balanced, they're the polar opposite of the SE535 which is why you must hate this so much going from the TF10. TF10 has boosted treble and bass and the mids aren't recessed, but they're just not boosted. It's what makes them more exciting and possibly more accurate sounding.
If you want something in between, go UM3X or even better, Earsonics SM3v2. I love both of those IEM's.
Pretty much summed up my thoughts and experiences.