Tidal Charm hasn't been BiS since it shared DR with other stuns (wotlk). There are other, much better trinkets out now for a 39. Mallet of Zul'Farrak is a str weapon and it only has a slightly higher topend than other weapons available (109 vs 105). In 5.4, due to the scaling of BoAs, MZF will no longer be the clear choice for rogues and other agi users, since BoAs will be able to take enchants like Mongoose or Dancing Steel. Why would you not want agi + crit over str?
Topend isn't the only important stat, you know.