My quick 2cp about Mutilate & expertise cap issue.
Like it was mentioned, it is dps loss but hardly significant.
On my own gear (average ilvl ~495): ShadowCraft reforge would end up with ~2-3% dodge chance for ... whopping 50 dps increase.
Just for comparison - using 750 Valor Points to upgrade any of T14 set item gets me ~200-300 dps increase.
However, NOT having expertise cap may result dodge-spree when you least need it (burst phases, adds, etc).
For example, Sparks on Elegon encounter - where 1-2 dodges in a row may be matter of having extra spark round or not.
For me, +50 dps on sustained Patchwerk fight does not offset the risk of losing 100-200k damage to unlucky dodges on important short burn phase.
Also, I personally just hate dodged abilities
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Bottom line is: Shadowcraft is tool - a very good one - but its modeling capabilities do not take into account special phases and conditions