Auto Focus on Target Change - Distance Slew

Right now there is an option for Auto Focus after Auto Centering Action, whilst i see this as a benefit for people like me using fast reflectors, I only see the benefit of doing this if the distance of the slew is big to compensate for any potential mirror shift. However if the slew is very small then it should not be needed. So can we have an option for Auto Focus on Slew > Specific Distance ?