I still think they don't make much sense
Almost all other combat actions are a Half Action, and can be combined with Aim. But Called Shot is a Full Action, and does not leave time for anything else. This is particularly nasty for Sniper-types, as Aimed Shots is most likely going to be most used them. It really screws with Accurate weapons as these NEED an Aim action to be used to their full potential.
By RAW you're best of spending a Full turn Aiming, then using the Called Shot on the next turn. This will result in a net +10 bonus to your shot, not taking into consideration bonuses from Range, Talents, Equipment, etc.
But compared to the alternate (DH approach) you could be putting out 1 aimed, called shot every turn with a net bonus of +10. So this change has basically halved your rate of fire, for no particularly good reason.