I think the changes to Walk of Echoes will not change most peoples minds about making the Trials of Magian versions of Emp weapons
This is especially true because this is coming alongside a significant change to the availability of merit WSs to our secondary/tertiary jobs. If they want people to be enticed to spend a significant amount of time and/or gil to obtain WoE weapons, they need to either strengthen those weapons, or greatly reduce the dice/residue required so the reward seems good for the effort.