Just adding my perspective on this great ski.
2013 Chochise 185cm w/ Marker Griffon.
I'm 5'8", 180lbs.
26 seasons of skiing
Love this ski, super stable at speed, carves like a dream, handles crud easily. I felt is was almost as torsionally stiff as my old (retired) metron m:ex's.
I can "manage" to make it down a bump field, but it would not be my first choice (I drop down to a pair of cheap 163 Atomic park skis for this). If you liked the Blizzard flipcore technology, then for glading and bumps, the Bonafide or Bushwacker would clearly have been a better choice.
As far as tuning, I would NOT detune or tweak anything. This ski works great (for me at least) as is.
I did plenty of research about mounting position, and the prevailing wisdom was to mount at the recommended center point. In hindsight, I would have chosen +1cm or even +2cm. Better yet, I'd have chosen schizo bindings so I could change center point depending on conditions. Given the length, width and weight of this ski, moving the center point forward would not compromise any of its strengths, but certainly would help make it a bit more responsive in tight conditions.
If you bought this ski to primarily ski "bumps and tighter terrain", then you did buy the wrong ski (as you have already concluded).